Pair of Unheated Blue Sapphires, 10.26 & 10.56 ct
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Main reasons to invest
Return Potential📈: An investment of €500 could reach an estimated value of €1,194 in 7 years.
Cost-to-Return Ratio ⚖️: After deducting 2.3 % in annual total costs (including storage and insurance), your net return could reach 13.2 % per year.
The light and heart of ceylon 💎: Each sapphire carries a distinct character: one pastel blue with GRS certification, the other fine light blue certified by GfD. Together, they reflect Sri Lanka’s unmatched legacy of gemstone craftsmanship. Their unheated purity and impressive carat weight ensure lasting relevance in both collector and investment circles.
Description
| Metric | Value |
|---|---|
| Investment Horizon | 5–7 Years |
| Expected CAGR (Balanced) | 13.2% p.a. after fees |
| Ambitious CAGR | 18.9% p.a. after fees |
| Entry Basis | ~31 % vs. retail benchmarks |
| Sharpe Ratio | 0.83 (vs. SMI: 0.61) |
| Value at Risk (VaR) | 97 % chance to exceed €24,850 after 7 years |
| Standard Deviation | 15.9% |
| Risk Rating | A (8.8/10 - Low Risk) |
- 5-7 Year horizon: Targeted to capture long-term value growth in unheated, certified Sri Lankan sapphires above 10 carats.
- 13.2 % CAGR (balanced): Based on a 70 % probability of achieving the 10.6 % historical CAGR (2010–2023) and a 41 % acquisition discount, resulting in a 13.2 % net return after fees.
- 18.9 % CAGR (optimistic): Reflects full continuation of historical market appreciation for untreated collector-grade sapphires amid sustained global demand.
- ~31 % Discount to Fair Value: Acquired well below B2C market benchmarks, verified through independent expert assessments and four comparable gem listings from The Natural Gem.
- Sharpe Ratio of 0.83: Demonstrates strong risk-adjusted performance, outperforming the SMI’s five-year ratio of 0.61 and confirming high efficiency in return-to-volatility balance.
- 97 % VaR Threshold: Indicates a high probability that the investment will exceed €24,850 after seven years, supported by conservative market modelling and historical pricing stability.
- Standard deviation (15.9 %): Low-to-moderate volatility relative to alternative assets, underlining the defensive characteristics of unheated, certified gemstones.
- Risk rating “A”: Reflects the asset’s low volatility, verified certification, and attractive entry discount, making it a stable choice for long-term tangible-asset portfolios.
Colored gemstones have long captivated investors and collectors alike, offering a unique blend of aesthetic beauty and financial security. Unlike traditional assets, their value is driven by rarity, cultural significance, and increasing global demand. The market for fine sapphires, sapphires, spinel and rubies has seen a steady appreciation, supported by limited supply and growing interest from emerging markets. Unlike diamonds, where synthetic alternatives pose a pricing challenge, top-tier natural colored gemstones maintain strong value retention due to their individuality and limited production. With auction records continuously being set, investing in premium colored gemstones is about owning a tangible piece of history with enduring worth.
Sri Lankan sapphires – historically known as “Ceylon sapphires” – rank among the most coveted gemstones in high-end jewelry and private collections. Their allure stems from Sri Lanka’s millennia-old gem tradition, centered around Ratnapura, the legendary “City of Gems.” The island’s unique geology yields stones of exceptional color, clarity, and size.
What truly sets Ceylon sapphires apart is their purity: many are completely unheated, a rarity that commands significant premiums at auction. Their vibrant cornflower-blue to violet hues, high transparency, and fine crystal structure give them unmatched brilliance and depth — qualities that make them a favorite for luxury houses like Bulgari, which crafted a masterpiece around a Gübelin-rated Sri Lankan sapphire scoring 98/100.
At auction, these stones continue to impress: in 2024, 19 top Sri Lankan sapphires achieved a combined total of roughly $12 million, averaging 169% above estimates. The record-breaking “Blue Belle of Asia”, a 392.5-carat gem, sold for $17 million at Christie’s.
Combining prestige of origin, natural beauty, and proven investment value, unheated Sri Lankan sapphires stand as one of the most enduring and desirable assets in the world of fine jewelry and collectible gemstones.
This dual-sapphire investment unites rarity, certification, and discounted acquisition value. Both stones were sourced directly from Sri Lanka and certified as unheated and untreated — the highest purity standard in the sapphire market. Their combined weight of 20.82 ct and dual certification from GRS and GfD position them among a select class of natural Ceylon sapphires above 10 ct.
With confirmed market liquidity, expert certification, and limited availability of unheated stones over 10 ct, these sapphires combine tangible beauty with financial resilience. The exit horizon of 2030–2032 aligns with ongoing appreciation trends in the premium gemstone sector, where untreated Ceylon sapphires remain a benchmark for enduring store-of-value assets.
The two unheated Ceylon sapphires combine rarity, certification, and a verified discount to market value. With moderate volatility, strong downside protection, and enduring collector demand, they offer a stable path to long-term appreciation and represent one of the most secure entries into the high-end coloured-gemstone market.
Expert

Carat Investments is a Swiss-based investment boutique specializing in real assets, with a primary focus on colored gemstones. Founded on a heritage of excellence and discretion, the company bridges centuries-old gemstone expertise with modern financial acumen to offer clients exclusive, inflation-resistant investment opportunities. Built on values of sustainability, integrity, and long-term vision, Carat Investments empowers clients to preserve and grow their wealth across generations.



