| Weight | 6.50 ct |
|---|---|
| Dimensions | 15.8 × 10.3 × 5 mm |
| Grade | Facet Grade |
| Variety | Sapphire Rough |
| Treatment | unheated |
| Mining Location | Kuruwita village around mining in Sri Lanka |
Natural Unheated Geuda-Type Blue Sapphire Rough – 6.50 ct from Kuruwita Village, Sri Lanka
Stone Identity & Quality
Stone Type: Natural Corundum
Variety: Blue Sapphire
Weight: 6.50 carats
Dimensions: 15.8 × 10.3 × 5 mm
Treatment Status: Unheated
Quality Grade: Facet Grade Rough
Origin: Kuruwita village around mining in Sri Lanka
This sapphire belongs to the geuda-type category commonly found in Sri Lanka.
Color & Visual Characteristics
In its natural unheated state, the stone displays a medium to light blue tone. The wide face provides good visual spread.
Color zoning and internal silk structures typical of geuda material are visible. These features influence how the stone may respond to heat treatment.
Internal & External Features
The material shows characteristic internal “smoke-like” inclusions and silk typical of Kuruwita geuda sapphire.
Surface features reflect natural alluvial origin. The geometry allows workable cutting orientation with a broad table potential.
Cutting & Treatment Potential
This sapphire remains unheated and untreated.
Geuda-type sapphire from Sri Lanka is historically known to respond to heat treatment by improving clarity and deepening blue saturation. However, heat treatment is always a controlled but unpredictable process. Results vary depending on internal chemistry and structure.
No specific outcome can be guaranteed. But, oke of the best quality for get strong blue color.
Even without heating, the stone maintains natural blue coloration and facet-grade potential.
Source & Ethical Position
Sourced directly from Kuruwita village around mining in Sri Lanka — a region well known for producing heat-responsive geuda sapphire material.
Danushka Gems & Minings maintains transparency in classification and treatment expectations. We distinguish clearly between natural state and potential enhancement possibilities.
FAQ
1. Is this sapphire natural?
Yes, it is a natural unheated blue sapphire from Kuruwita village around mining in Sri Lanka.
2. What is geuda sapphire?
Geuda refers to Sri Lankan sapphire material that may respond to heat treatment to enhance color and clarity.
3. Will heating guarantee royal blue color?
No. Heat treatment can improve color, but results are never guaranteed. But, this one is one of the best quality type for turn strong blue color.
4. Can it be cut without heating?
Yes, it can be faceted in its natural state depending on clarity mapping.
5. Why is Kuruwita origin important?
Kuruwita village around mining in Sri Lanka is historically known for producing geuda-type heat-responsive sapphire material.
