Synthetic Silicon Carbide / Moissanite crystal rough
Synthetic Silicon Carbide / Moissanite crystal rough · Rough crystal / Uncut
Not applicable (Rough state) Cut
Carat
Estimated 15-20 carats based on visual proportions
Color
Near colorless (equivalent to G-H range)
Clarity
SI1 (Visible internal growth features and striations)
Shape
Rough crystal / Uncut
Overall Assessment
An impressive, large uncut specimen of synthetic silicon carbide displaying classic hexagonal crystal growth patterns and high optical dispersion.
Cut Quality
Not applicable (Rough state)
Brilliance
High refractive index creating strong luster and metallic sheen on rough faces
Fire
Exceptional dispersion (higher fire than diamond due to optical properties)
Scintillation
Limited in rough form, concentrated along polished cleavage and fracture planes
Proportions
Uncut hexagonal crystal habit typical of synthetic moissanite
Symmetry
Asymmetrical rough crystal form
Polish
Raw crystal faces with high natural luster
Fluorescence
Faint yellowish-green
Inclusions
Parallel growth lines, internal needles, and striations
Blemishes
Natural crystal striations, growth step patterns on the surface
Origin
Laboratory-synthesized (likely Acheson process)
Treatment Detection
No secondary treatments detected; typical raw lab-grown crystal characteristics
Estimated Value
Low-to-moderate industrial/rough specimen value ($100 - $300)
Certification Estimate
Gemological testing needed; GIA or IGI would classify as synthetic moissanite
Investment Potential
Low investment value as a raw specimen due to mass lab production
Similar Diamonds
Comparable to high-index synthetic rough materials rather than standard diamond rough
Setting Suggestions
Requires precision cutting and faceting into a standard gemstone shape before setting
Care & Maintenance
Store separately to prevent scratching softer gemstones; clean with warm soapy water
Interesting Facts
Moissanite was originally discovered in a meteorite crater by Henri Moissan in 1893