| Weight | 15.70 ct |
|---|---|
| Variety | Sapphire Rough |
| Mining Location | Ratnapura village around mining in Sri Lanka |
| Treatment | unheated |
15.70 ct Ceylon Blue Sapphire Rough – Unheated Facet Grade from Ratnapura Sri Lanka
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Stone Identity & Quality
This 15.70 carat natural blue sapphire rough is sourced from Ratnapura village around mining in Sri Lanka, one of the world’s most recognized sapphire-producing regions. The stone remains completely unheated and untreated, maintaining its original geological state. It is categorized as facet-grade material with strong structural relevance for professional cutting.
Color & Visual Characteristics
The sapphire displays a natural blue body color ranging from soft to medium tone. The presence of white silky inclusions contributes to its slightly diffused appearance. These visual characteristics are typical of Sri Lankan sapphires that may respond to heat treatment.
Internal & External Features
Internally, the stone shows silk inclusions, growth zoning, and directional structure. These features are important for determining cutting orientation and treatment potential. Externally, the rough retains natural surfaces with stable proportions, allowing multiple evaluation angles.
Cutting & Treatment Potential
This material is considered heat-responsive due to the presence of silk inclusions. With professional heat treatment, there is potential for improved color intensity, though outcomes are never guaranteed. The structure also allows for flexible planning, including the possibility of dividing into two stones for optimized yield, depending on internal mapping.
Source & Ethical Position
Sourced directly from Ratnapura village around mining in Sri Lanka, this sapphire represents material obtained through traditional mining communities. The supply chain supports local miners and maintains direct sourcing practices.
Frequently Asked Questions
No, this stone is completely unheated and in natural condition.
It shows heat-responsive characteristics, but results always depend on professional evaluation.
Yes, this is classified as facet-grade rough with proper structural depth.
Yes, depending on internal structure, it may be divided for better yield.
This material is best suited for experienced cutters and buyers who understand sapphire processing.
