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Yellow Sapphire, 11.528ct (Unheated)

Asset value
18.073,64 €
Earning potential
13.5%
Splints left
0/322
Investment horizon in years
5-7
Return-to-Risk Assessment
6/10
Performance since release
+12.3%

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Request to purchase the entire asset instead of just fractions.

Main reasons to invest

  • Return Potential: An investment of €500 could reach an estimated value of €1,215 in 7 years.

  • Cost-to-Return Ratio: With just 2.9% annual total costs, your net profit could be 13.5% per year.

  • Unheated Rarity: Natural Ceylon provenance with reversible color-change effect, 27.3% price buffer, and exceptional transparency drive strong upside potential.

     

Description

Investment Case
Investment Thesis
 
Metric Value
Investment Horizon 5–7 Years (Target exit: 2031–2033)
Expected CAGR (Balanced) 13.5% p.a. after fees
Optimistic CAGR 16.1% p.a. after fees
Entry Basis -27.3% price buffer to market after fees
Sharpe Ratio 0.60
Value at Risk (VaR) 93.0% probability of exceeding initial investment after 7 years
Standard Deviation 23.1%
Number of Sales Points 15 market comparables
Risk Rating B+, Moderate (natural rarity, limited liquidity)
  • 5–7 Year Horizon: Planned exit between 2031 and 2033 to capture continued appreciation in untreated Ceylon sapphires as mine output declines and collector demand strengthens.
  • 13.5% Net ROI p.a. (Balanced): Based on a probability-weighted scenario using historical gemstone market data and observed performance of unheated Ceylon sapphires.
  • 16.1% Net ROI p.a. (Ambitious): Reflects a stronger upside scenario supported by exceptional size, natural color-change phenomenon, and increasing scarcity of untreated specimens.
  • ~27.3% Buffer to Market: Entry pricing was verified below current market value after fees, supporting an attractive acquisition basis.
  • Market Benchmarks: Current market comparables show unheated Ceylon yellow sapphires in the 10-13ct range trading at $2,061-4,092 per carat at retail, with similar Bellerophon-certified stones commanding premium pricing.
  • Sharpe Ratio of 0.60: Indicates a solid risk-adjusted return profile relative to expected appreciation in the natural gemstone market.
  • VaR 93.0%: Modelled probability that the asset value exceeds the initial investment after seven years.
  • Standard Deviation (23.1%): Reflects moderate volatility typical of high-grade natural gemstones with limited transaction frequency.
  • 15 Market Comparables: The investment case is supported by multiple relevant market data points from specialist dealers and auction houses, providing robust valuation confidence.
Category
Why Invest in This Category?
 

Gemstones represent one of the most established and resilient alternative asset classes, driven by natural scarcity, global demand, and cultural significance. High-quality, untreated stones in particular benefit from finite supply and increasing interest from collectors and investors seeking tangible, portable stores of value.

Asset Specifics
Why Invest in This Asset?
 

This 11.528-carat natural yellow sapphire from Sri Lanka represents a rare convergence of geological heritage, gemological excellence, and market scarcity. Originating from Ceylon, the world's most celebrated sapphire source for over 2,000 years, this stone carries provenance that commands premium recognition among collectors and investors globally. Its substantial size, exceptional transparency, and vivid color place it firmly within investment-grade territory.

Key Highlight
What sets this sapphire apart is its completely untreated status, a distinction that fewer than 1% of sapphires on the market can claim. In an industry where heat treatment is standard practice, this natural stone also exhibits a documented reversible color-change effect, a rare photochromic phenomenon that enhances both its scientific interest and collector appeal.

The stone has been rigorously analyzed using advanced spectroscopy (FTIR, EDXRF, Raman, LIBS, UV-vis) and certified by Bellerophon, confirming zero treatment and natural origin. With Sri Lankan sapphire output in long-term decline, untreated stones of this caliber are becoming increasingly scarce, supporting sustained value appreciation in the colored gemstone market.

Market comparables show unheated Ceylon yellow sapphires in the 10.0ct to 13.0ct range trading at $2,061 to $4,092 per carat at retail. A similar 13.07ct Bellerophon-certified stone with color-change properties is listed at $4,092 per carat, reinforcing this asset's competitive positioning.

For investors, this sapphire offers exposure to a tangible, portable asset with geological rarity, third-party certification, and alignment with long-term supply constraints. Acquired at a significant discount to retail comparables, it provides a disciplined entry into one of the most historically resilient segments of the colored gemstone market.

 

Summary
Conclusion
 
This 11.5-carat unheated Ceylon yellow sapphire combines exceptional rarity, documented natural provenance, and investment-grade quality. With its remarkable size, transparency, and reversible color-change phenomenon, it represents a scarce commodity as Sri Lankan output declines. Its untreated status, comprehensive scientific certification, and 550-million-year geological heritage make it a compelling long-term asset for discerning collectors.

Expert

CEYLONS | MUNICH

At CEYLONS | MUNICH , we redefine the essence of rarity. Our exclusive access to rare gemstones is matched only by our dedication to quality. Our commitment to excellence is rooted in our “mine to market” approach, ensuring a traceable journey from the source to your hands. By embracing a direct supply chain, we eliminate middlemen, placing you at the forefront of a seamless and trustworthy gemstone experience. Discover the allure of gemstones like never before, where each stone tells a tale of its journey, and every purchase reflects our unwavering commitment to value and authenticity.

Additional details

Asset ID
583c1c84-e123-4b0c-a7b9-db237d24fac6
Type of Gemstone
Sapphire
Carat weight
11.528 ct
Measurements
13.12 x 11.30 x 9.22 mm
Cut grade
Faceted Oval
Certificate
Bellerophon Gemlab
Colour
Pastel Yellow to Intense Yellow

Documents

Aurelio Image CEO

Aurelio

CEO & Co-Founder

Yellow Sapphire, 11.528ct (Unheated)