| Weight | 11.73 ct |
|---|---|
| Dimensions | 12.5 × 9.9 × 10.4 mm |
| Grade | Facet Grade |
| Variety | Sapphire Rough |
| Color | White Geuda with blue color zoning |
| Mining Location | Kuruwita village around mining in Sri Lanka |
| Treatment | Natural Unheated – Suitable for heat treatment |
Kuruwita Village Around Mining in Sri Lanka
This is a natural Ceylon heating sapphire (Geuda type) weighing 11.73 carats, measuring 12.5 x 9.9 x 10.4 mm, sourced directly from Kuruwita village around mining in Sri Lanka.
Stone Identity & Quality
Stone Type: Natural Corundum (Sapphire)
Variety: Ceylon Geuda Sapphire
Weight: 11.73 carats
Dimensions: 12.5 x 9.9 x 10.4 mm
Treatment Status: Natural Unheated – Suitable for heat treatment
Quality Grade: Facet Grade Rough
Origin: Kuruwita village around mining in Sri Lanka
This material is classified as facet-grade rough, meaning it contains a clean and workable area suitable for professional cutting after proper orientation planning.
Color & Visual Characteristics
This Geuda sapphire displays:
A milky-white to translucent body color
Distinct natural blue color zoning
Visible internal structure that suggests strong heat response
Clean facet-grade area clearly identifiable within the crystal
The blue zoning indicates potential transformation into a stronger and more vivid blue sapphire after controlled heat treatment — a traditional and widely accepted practice in Sri Lankan sapphire processing.
Internal & External Features
Internally, the stone shows:
Natural crystal growth patterns
Zoned coloration typical of Geuda material
Transparent to semi-translucent sections
No major structural fractures affecting the main cutting area
Externally, the crystal retains:
Natural alluvial surface texture
Minor surface abrasions from mining
Original crystal structure integrity
These characteristics confirm the stone’s natural origin and suitability for skilled lapidary work.
Cutting & Heating Potential
Geuda sapphires are valued for their transformational potential. With proper orientation and professional heat treatment, this material may produce:
Improved transparency
Enhanced blue saturation
Strong Ceylon-type color appearance
The presence of a visible clean facet-grade section allows for thoughtful cutting planning with balanced weight retention and color performance.
Source & Ethical Position
This sapphire is sourced directly from mining communities in Kuruwita village around mining in Sri Lanka, where generations have worked in traditional gemstone extraction. The stone is acquired directly from mining sources — not secondary resale channels.
FAQ
Q1: What is Geuda sapphire?
Geuda is a type of sapphire rough that appears milky or whitish but contains internal blue zoning that can become rich blue after heat treatment.
Q2: Is this stone natural?
Yes. This is a natural Ceylon sapphire sourced from Kuruwita village around mining in Sri Lanka.
Q3: Is the stone heated?
Currently it is unheated but suitable for professional heat treatment.
Q4: What does facet grade mean?
Facet grade means the rough contains a clean, cuttable area suitable for faceting into a finished gemstone.
Q5: Why is color zoning important?
Natural blue zoning indicates potential for strong color development after heating and proper cutting orientation.
