Natural Ceylon Sapphire Geuda Twin Crystal – 112.70 ct Huge Unheated Crystal from Kolonna, Sri Lanka

Stone Identity & Quality

This is a large Natural Ceylon Sapphire Geuda Twin Crystal weighing 112.70 ct and measuring 50 × 18.9 × 13.7 mm. It was sourced from Kolonna village around mining in Sri Lanka and remains in its natural unheated condition. The crystal shows a strong natural formation with twin crystal structure, geuda body appearance, and visible growth features. This piece is not presented as a standard facet grade rough stone overall, but as a special sapphire crystal specimen with some areas that may be studied for possible facet grade geuda potential.

Color & Visual Characteristics

The crystal displays a geuda-type sapphire body with yellowish to pale translucent areas, internal silky or smoky structure, and reflective natural crystal surfaces. Under light, the stone shows zoning, growth texture, and natural optical behavior that are typical of sapphire crystals formed under complex geological conditions. The visual value of this piece comes from its large size, crystal structure, and natural formation rather than only from possible cutting results.

Internal & External Features

This sapphire crystal has visible naturally occurred growth marks, surface texture, internal structure, and twin formation features. One complete crystal end appears joined with another twin crystal, while the second twin crystal has a broken termination from the top. These features give the stone strong geological interest and make it suitable for collectors, mineral display, sapphire formation study, and buyers who appreciate natural corundum crystals from the source.

Cutting & Treatment Potential

This crystal contains geuda-type areas, and some parts near the top and bottom may have facet grade potential after careful inspection. Geuda sapphire can sometimes be heat treated to improve blue color when the internal structure is suitable, but the final result depends on the actual rutile/silk condition, clarity, chemistry, and professional heating response. Because this is a special one-of-a-kind crystal specimen, cutting should be considered very carefully. Its main value may remain stronger as a natural sapphire crystal in mother formation style rather than being fully cut.

Source & Ethical Position

This sapphire crystal was sourced from Kolonna village around mining in Sri Lanka, a country globally respected for natural sapphire and corundum deposits. Danushka Gems & Minings presents this stone honestly as a large natural Ceylon sapphire geuda twin crystal with geological, collector, and possible selective cutting interest. The goal is to provide clear source-connected information so buyers can understand the true nature of the crystal before making any cutting, heating, or collection decision.