Not a diamond; this is a natural green crystal, likely tourmaline or emerald showing typical prismatic habit and vertical striations.
Not a diamond; this is a natural green crystal, likely tourmaline or emerald showing typical prismatic habit and vertical striations. · Rough crystal, prismatic columnar form with natural faces
Not applicable (uncut raw crystal) Cut
Carat
Estimated 3.5 to 5.0 carats based on visible dimensions in matrix
Color
Natural Fancy Vivid Green
Clarity
Included (rough state with typical inclusions and internal fractures)
Shape
Rough crystal, prismatic columnar form with natural faces
Overall Assessment
An appealing natural green crystal specimen displaying strong prismatic habits and characteristic vertical striations, highly valued by mineral collectors and suitable for custom lapidary work
Cut Quality
Not applicable (uncut raw crystal)
Brilliance
Varies by angle due to raw, unpolished state
Fire
Low to moderate dispersion characteristic of green beryl or tourmaline
Scintillation
Limited in raw form; will improve significantly upon cutting and polishing
Proportions
Elongated columnar crystal habit
Symmetry
Natural crystal symmetry, hexagonal prismatic
Polish
Unpolished natural crystal faces showing striations
Fluorescence
Inert to faint, depending on exact mineral species
Inclusions
Typical natural inclusions, internal fractures, and growth tubes
Blemishes
Natural surface striations, etch channels, and rough termination
Origin
Natural rough mineral, likely from a pegmatite or schist environment (Brazil, Colombia, or Africa)
Treatment Detection
Raw and untreated in its current rough state
Estimated Value
Varies widely from $150 to $1,500 depending on exact mineral species, transparency, and exact weight
Certification Estimate
GIA or Gübelin (if identified as emerald) for origin and treatment reports
Investment Potential
Moderate as a collector specimen; high potential if cut into a high-clarity faceted gemstone
Similar Diamonds
None, as this is a colored gemstone crystal rather than a diamond
Setting Suggestions
Wire-wrapped pendant or custom organic bezel setting to preserve the raw crystal aesthetic
Care & Maintenance
Avoid ultrasonic cleaners if treated or heavily included; clean gently with warm soapy water and a soft brush
Interesting Facts
Vertical striations along the prism face are a hallmark growth feature of tourmaline and certain beryls