At a time when engagements are synonymous with grandiose declarations and glittering rings, it’s easy to get carried away by the quest for the perfect gem, often accompanied by an exorbitant price tag.
Did you know? The low average for the poorest quality of all mixed diamonds is €3,150 per carat. The high average is…379,500€ per carat.
However, an alternative is emerging, offering unparalleled splendor without emptying your bank account: alternative engagement stones. These unique gems, often unknown to the general public, offer distinct beauty and special meaning without the prohibitive price tag associated with traditional diamonds.
In this article, we explore 15 rare engagement stones that captivate with their rarity, brilliance and sentimental value, proving that luxury and originality can go hand in hand without breaking the piggy bank.
Useful info: the price is an average that I have observed during my research and according to the official bodies governing gem prices around the world. This average concerns the most commonly used sizes, from 1 to 1.99 carats.
I would remind you that gem prices are often similar to real estate prices: the fewer square meters there are and therefore the more carats, the more expensive it will be per square meter and therefore…per carat! So it’s not necessarily a good idea to take the smallest stones – on the contrary!

- Tsavorite garnet: €500-1200 per carat
- Imperial topaz: €120 – €800 per carat
- Axinite: €40-130 per carat
- Morganite: €150 per carat
- Watermelon tourmaline: €450 per carat
- Moldavite: €10-60 per carat
- Ametrine: 6-30€ per carat
- Spinel: 50-2500€ per carat
- Kunzite: €18-110 per carat
- Tanzanite: 280-840€ per carat
- Spessartite garnet: 680-1000€ per carat
- Boulder opal: €250-520 per carat
- Diopside: €50-150 per carat
- Cat’s eye moonstone: €20-120 per carat
- Rutile quartz or angel hair: €50-60 per carat
- Alternative: Synthetic stones
- Alternative: Second Hand Engagement Rings
Tsavorite garnet: €500-1200 per carat

Tsavorite garnet, a vibrant, intense green gem, is a true wonder of nature. First discovered in Kenya in 1967 by British geologist Campbell R. Bridges, this jewel takes its name from the Tsavo National Park, where it was first found. Bridges, this jewel takes its name from Tsavo National Park, where it was first found. With its spectacular color that rivals that of emerald, Tsavorite garnet is fast becoming a favorite in the jewelry world.
What sets Tsavorite garnet apart, in addition to its dazzling color, is its rarity. Unlike other more common garnets, Tsavorite is extremely rare, making it an exclusive option for engagement rings. Its rarity is due to a number of factors, including its formation under specific geological conditions and its location limited to certain regions of East Africa.
In terms of price, Tsavorite garnet offers excellent value for money compared with other green-colored gemstones such as emerald. With prices generally ranging from 500 to 1,200 euros per carat, Tsavorite is more affordable while offering exceptional beauty and rarity. For couples looking for a unique and dazzling alternative to the traditional engagement ring, Tsavorite Garnet is an option to be seriously considered.
Imperial topaz: €120 – €800 per carat

Imperial Topaz, a gem with warm, shimmering hues, embodies elegance and sophistication. Its name evokes both the majesty and rarity that characterize this unique gemstone. Unlike the more common blue topaz, Imperial Topaz is distinguished by hues ranging from orange-pink to golden-purple, resulting from the presence of iron and chromium in its crystalline structure.
Deposits of Imperial Topaz are mainly found in Brazil, Russia and Myanmar, although other regions can also produce this exceptional gem. Its relative rarity, combined with its fascinating colors, makes it a popular choice for engagement rings.
In terms of price, Imperial Topaz offers a fairly wide range, with prices generally varying between 120 and 800 euros per carat. This price range depends on factors such as the stone’s size, purity and color intensity. With its bewitching brilliance and rarity, Imperial Topaz is an attractive option for couples looking for a unique and affordable gemstone to symbolize their commitment.
Axinite: €40-130 per carat

Axinite, a gem with subtle reflections and natural beauty, offers a charming and inexpensive alternative for engagement rings. Native to various regions of the globe, including Europe, Asia and North America, Axinite is distinguished by its color palette ranging from deep violet to reddish brown, sometimes with shimmering highlights.
Although less well known than other gemstones, Axinite’s understated elegance and rarity make it a unique choice for couples looking for an unconventional alternative for their engagement rings.
In terms of price, Axinite is remarkably affordable, with prices generally ranging from 40 to 130 euros per carat. This affordability makes it an attractive option for those looking for a distinctive gemstone without breaking the bank.
With its natural charm and moderate cost, Axinite offers a delicate and original way to symbolize commitment and eternal love.
Morganite: €150 per carat

Morganite, with its soft pink hue and delicate brilliance, is a gemstone that evokes romance and femininity. This delicate gem belongs to the beryl family, like emerald and aquamarine, and takes its name from the American financier and collector J.P. Morgan.
Mainly mined in Brazil, Afghanistan and parts of the United States, Morganite is prized for its pale pink to salmon-pink color, due to the presence of manganese in its chemical composition. A great alternative to pink diamonds!
In terms of price, Morganite offers excellent value for money, with an average cost of around 150 euros per carat. This affordability makes it an attractive option for couples looking for an elegant and affordable alternative to traditional diamonds.
Thanks to its softness and romantic charm, Morganite is a popular gemstone for engagement rings, symbolizing love and commitment in a subtle, refined way.
Watermelon tourmaline: €450 per carat

Watermelon Tourmaline, also known as “Watermelon Tourmaline” for its hues reminiscent of this juicy fruit, is a dazzlingly beautiful gemstone. This gem is famous for its shades of pink, green and white, which blend harmoniously to create a captivating visual spectacle.
Originating mainly from mines in Brazil, Madagascar and Nigeria, Watermelon Tourmaline is prized for its rarity and variety of colors. Each stone is unique, with variations in tone that make it even more special and desirable.
As for price, Tourmaline Melon d’Eau is generally around 450 euros per carat, although this may vary according to the quality and size of the stone. Despite its relatively high cost, this gem remains a coveted option for engagement rings, offering the perfect combination of natural beauty and rarity.
With its vivid colors and remarkable brilliance, Watermelon Tourmaline is a gemstone that symbolizes love and passion in a spectacular and unforgettable way.
Moldavite: €10-60 per carat

Moldavite, a gemstone of extraterrestrial origin, embodies a rarity and intrigue that captivate the imagination. Formed millions of years ago when a meteorite impacted the earth’s surface, Moldavite is composed mainly of natural glass and is known for its distinctive translucent green color.
Moldavite deposits are mainly found in the Czech Republic and Germany, although specimens can also be found in other parts of the world. Because of its extraterrestrial origin and rarity, Moldavite is a prized gemstone for collectors and lovers of unique jewelry.
In terms of price, Moldavite is relatively affordable, with prices generally ranging from 10 to 60 euros per carat. This affordability makes it an attractive option for those seeking a distinctive gemstone steeped in history without spending a fortune.
With its fascinating history and natural beauty, Moldavite is a gemstone that inspires awe and wonder, symbolizing the connection between the Earth and the universe in a unique and evocative way.
Ametrine: 6-30€ per carat

Ametrine, a natural fusion of violet amethyst and golden citrine, is a rare and beautiful gemstone that offers an enchanting symphony of colors. This unique gem features shades ranging from deep violet to golden yellow, creating a striking contrast and incomparable beauty.
The main Ametrine deposits are in Bolivia, where this precious stone is mined in limited quantities. Its rarity, combined with its distinctive beauty, makes it a sought-after choice for collectors and gem lovers alike.
Ametrine is relatively affordable, with prices generally ranging from 6 to 30 euros per carat. This affordability makes it an attractive option for those looking for a unique, colorful gemstone without having to spend a considerable sum.
With its vibrant hues and rarity, Ametrine is a gemstone that symbolizes harmony and balance, capturing the essence of the fusion between two worlds in a single dazzling gem.
Spinel: 50-2500€ per carat

Spinelle, an often overlooked but exceptionally beautiful gem, offers an elegant and precious alternative for engagement rings. This gemstone comes in a range of dazzling colors, from deep red to pink, violet, blue and even black.
Native to various parts of the world, including Sri Lanka, Burma, Tanzania and Tajikistan, Spinelle is prized for its rarity and remarkable brilliance. It has often been confused with other gemstones such as ruby and sapphire due to its similarities in color, but it has a beauty and individuality all its own.
In terms of price, Spinelle offers a fairly wide range, generally from 50 to 2,500 euros per carat. This price range depends on several factors, including the color, cut, purity and origin of the stone. The rarest and most precious Spinels are often those with bright, saturated tones, such as red or blue.
With its rarity and dazzling beauty, Spinelle is a gemstone that symbolizes passion, vitality and romance, making it an ideal choice to seal a commitment with radiance and elegance.
Kunzite: €18-110 per carat

Kunzite, a delicate, feminine gem, enchants with its softness and pastel pink color. This gemstone belongs to the spodumene family, like Hiddenite and green Spodumene, and owes its name to American gemologist George Frederick Kunz, who first identified it in the early 20th century.
Mainly mined in Brazil, Madagascar and Afghanistan, Kunzite is appreciated for its transparency, luminosity and soft pink hue, evoking romance and tenderness. Its color can vary from pale pink to deeper violet, depending on the presence of manganese in its composition.
In terms of price, Kunzite is relatively affordable, with prices generally ranging from 18 to 110 euros per carat. This affordability makes it an attractive option for those looking for a soft, feminine gemstone for their engagement ring, without having to spend a considerable sum.
With its delicate charm and soothing color, Kunzite is a gemstone that symbolizes love, compassion and harmony, offering a gentle, subtle way to celebrate commitment and lasting affection.
Tanzanite: 280-840€ per carat

Tanzanite, a captivatingly beautiful gemstone, is prized for its unique color, which varies from deep blue-purple to intense violet. First discovered in 1967 in the Kilimanjaro mountains of Tanzania, this gem quickly became one of the world’s most coveted gems.
Tanzanite takes its name from the place where it was discovered and is prized for its exceptional rarity. Indeed, Tanzanite is a singular gemstone, as it is found in only one region of the world. Its spectacular color and rarity make it a popular option for engagement rings and high-end jewelry.
In terms of price, Tanzanite generally ranges from 280 to 840 euros per carat. This cost may vary according to the size, quality and color intensity of the stone. Large, intensely colored Tanzanites are often the most precious.
Just a reminder: tanzanite’s color is generally not natural.
With its mesmerizing brilliance and exceptional rarity, Tanzanite is a gemstone that embodies elegance and luxury, offering a distinctive and memorable way to symbolize love and eternal commitment.
Spessartite garnet: 680-1000€ per carat

Spessartite garnet, which may also be known as “Mandarin garnet” for its bright orange color reminiscent of tangerines, is a vibrant yet elegant gemstone. This gem takes its name from the Spessart region of Germany, where it was first discovered.
Spessartite garnet deposits are mainly found in Africa, notably in Nigeria, Mozambique and Mali, as well as in Brazil and Namibia. This gemstone is appreciated for its warm, luminous color, which evokes vitality, passion and creativity.
As far as price is concerned, Spessartite garnet generally ranges from 680 to 1,000 euros per carat. This cost may vary according to the size, quality and color intensity of the stone. Spessartites of intense color and large size are often the most precious.
With its flamboyant brilliance and bewitching color, Spessartite Garnet is a gemstone that embodies joie de vivre and positive energy, offering a bold and distinctive way to symbolize love and eternal commitment.
Boulder opal: €250-520 per carat

Boulder Opal, a dazzling gem with shimmering reflections, is a true wonder of nature. This unique gemstone is characterized by bursts of color that seem to dance in the light, creating a mesmerizing visual effect.
Originating in the mining regions of Queensland, Australia, Boulder Opal is often extracted from sedimentary rocks called “nodules”, where it forms naturally. Its name derives from the cutting method used, where the stone is extracted with its host material, bedrock, adding to its natural charm and rustic beauty.
In terms of price, Boulder Opal generally ranges from 250 to 520 euros per carat. This cost may vary according to the size, quality and color intensity of the stone. Boulder Opals, with their more vibrant and pronounced play of colors, are often the most prized.
With its unique brilliance and brilliant colors, Boulder Opal is a gemstone that embodies magic and fascination, offering a captivating and original way to symbolize love and eternal commitment.
Diopside: €50-150 per carat

Diopside, an often overlooked but remarkably beautiful gem, offers an elegant alternative for engagement rings. This gemstone comes in a range of colors, from deep green to black and even light blue.
Native to various parts of the world, including Russia, Italy, Brazil and Myanmar, Diopside is prized for its remarkable brilliance and transparency. Although less common than other gemstones, Diopside offers a natural beauty and timeless elegance that make it an attractive choice for jewelry.
In terms of price, Diopside is relatively affordable, with prices generally ranging from 50 to 150 euros per carat. This affordability makes it an attractive option for those looking for a distinctive, sophisticated gemstone without having to spend a considerable sum.
With its unique brilliance and rich colors, Diopside is a gemstone that symbolizes the beauty of nature and offers an elegant and refined way to celebrate love and eternal commitment.
Cat’s eye moonstone: €20-120 per carat

Cat’s Eye Moonstone, an enchanting gem with shimmering reflections, captivates with its mysterious beauty. This gemstone has a shimmering glow that resembles that of a cat’s eye, creating a captivating optical effect.
Mainly mined in Sri Lanka, India and Madagascar, Cat’s-eye moonstone is prized for its milky color and shimmering cat’s-eye effect. This gem is often cut as a cabochon to highlight its luminous reflections.
In terms of price, Cat’s Eye Moonstone is relatively affordable, with prices generally ranging from 20 to 120 euros per carat. This affordability makes it an attractive option for those looking for a distinctive, mystical gemstone without having to spend a considerable sum.
With its bewitching charm and shimmering reflections, Cat’s Eye Moonstone is a gemstone that embodies magic and femininity, offering a gentle, subtle way to symbolize love and eternal commitment.
Rutile quartz or angel hair: €50-60 per carat

Rutile Quartz, often nicknamed “Angel’s Hair” because of its golden inclusions resembling delicate threads, is a fascinating and elegant gem. This gemstone takes its name from the presence of rutile crystals inside the quartz, which create a spectacular visual effect.
Mainly mined in Brazil, Madagascar and India, Rutile Quartz is prized for its unique inclusions, which give it a distinctive character and natural beauty. Rutile inclusions appear as fine golden needles, which seem to float inside the stone like angel threads.
In terms of price, Rutile Quartz is relatively affordable, with prices generally ranging from 50 to 60 euros per carat. This affordability makes it an attractive option for those looking for a distinctive, luminous gemstone without having to spend a considerable sum.
With its delicate charm and light-catching golden inclusions, Rutile Quartz is a gemstone that embodies elegance and grace, offering a subtle and refined way to symbolize love and eternal commitment.
diamond: 1600/ct for the lowest quality yellow diamond to 1,150,000 for 1ct of perfect quality pink diamond, with a low average worst quality for all diamonds combined of 3158/ct and a high average of 379,500/ct.
Alternative: Synthetic stones

Synthetic stones are emerging as a contemporary alternative in the world of engagement rings.
Manufactured in the laboratory, they offer superior durability and consistency of quality, while avoiding the concerns associated with mining.
Their infinite variety of colors and shapes allows for unique personalization, while their affordability makes them an attractive option for many couples.
In short, synthetic stones offer a combination of durability, ethics, personalization and affordability, making them a modern, responsible alternative for engagement rings.
Alternative: Second Hand Engagement Rings

Another alternative has recently emerged that offers a multitude of advantages: opting for a second-hand engagement ring.
First of all, these rings carry a rich, emotionally-charged story, making the wearer a link in this romantic saga.
What’s more, choosing a second-hand ring is an ethical and ecological gesture, helping to reduce the environmental footprint associated with mining.
Add to this the touch of originality and character inherent in second-hand rings, as well as their undeniable financial appeal, and you have an incomparable option for symbolizing your commitment.
In short, second-hand engagement rings offer a unique combination of meaning, ethics, style and economy, making them the ideal choice for couples seeking deep symbolism and authentic beauty.
And of course, you don’t need to be engaged to choose your stone – you deserve it, whatever your status!



