35 ct Facet Grade Ceylon Geuda Sapphire Rough – Large Elahera Unheated Heating Material

Stone Identity & Quality

This is a natural facet-grade Ceylon geuda sapphire rough weighing 35.00 ct and measuring 20.3 × 16.8 × 10.11 mm.

The stone is currently unheated and was sourced from Elahera village around mining in Sri Lanka.

It is a substantial single rough piece with enough body and depth to allow professional evaluation for both multi-stone trimming and one larger principal stone.

Because of the visible internal structure, the material should be carefully planned before any cutting begins.

Color & Visual Characteristics

Under the shown lighting, the rough appears pale to near-colorless in some areas, with yellowish internal zones and bluish to neutral transmitted-light behavior depending on orientation.

Different areas respond differently under strong light because of variations in thickness, internal features, and localized color concentration.

As with any geuda sapphire rough, the final face-up color after cutting or heat treatment cannot be predicted with certainty from the rough alone.

Internal & External Features

The stone shows:

visible inclusion zones

natural internal fractures and structural features

cleaner transparent sections

localized yellowish internal areas

irregular alluvial or naturally worn external surfaces

sufficient depth for multiple cutting directions

The red-marked planning areas in the evaluation images indicate the importance of separating inclusion-heavy zones from the cleaner body.

This is a stone where mapping the internal structure before trimming is essential.

Cutting, Specimen, or Treatment Potential

This rough is particularly interesting because of its large starting size and the possibility of producing multiple stones from one piece.

A practical cutting strategy would be:

identify the strongest cleaner body

isolate inclusion-heavy sections

trim approximately 4 smaller pieces where necessary

preserve the best remaining section for one larger main stone

evaluate each separated piece individually for orientation and depth

This approach may help improve overall usability of the rough rather than forcing all material into one finished gem.

Because it is geuda material, the stone may also be considered for professional heating evaluation. Depending on its chemistry, silk, inclusions, and internal response, heat treatment may change color or transparency, but no specific result can be guaranteed.

No final number of stones, finished weights, clarity grades, or heat-treatment outcome should be assumed before trimming and evaluation.

Source & Ethical Position

Danushka Gems & Minings works directly around Sri Lankan gemstone-producing regions and regularly handles rough material that requires practical source-based evaluation rather than simple resale.

With larger geuda rough like this, our approach is to explain the real cutting limitations, inclusion positions, possible trimming strategy, and treatment uncertainty before making claims about the finished result.

This allows cutters, dealers, and gemstone buyers to make informed decisions based on the actual material rather than unrealistic expectations.