Not a diamond; this is a faceted synthetic or treated quartz / glass piece showing intense iridescent thin-film interference (often marketed as mystic quartz or treated quartz, or possibly lead crystal/glass).
Not a diamond; this is a faceted synthetic or treated quartz / glass piece showing intense iridescent thin-film interference (often marketed as mystic quartz or treated quartz, or possibly lead crystal/glass). · Custom faceted square/rectangular block (not a standard gemstone cut)
Fair to Poor (artisan or experimental hand-cut block with irregular facet symmetry) Cut
Carat
Exceeds standard jewelry gemstone scales visually (likely hundreds of carats if mineral, but material is non-diamond glass or coated quartz)
Color
Colorless base with artificial iridescent multi-colored surface coating
Clarity
Included (shows distinct internal fracture planes, swirls, and trapped bubbles typical of glass or heavily fractured quartz)
Shape
Custom faceted square/rectangular block (not a standard gemstone cut)
Overall Assessment
An interesting ornamental display object or novelty piece featuring striking rainbow iridescence, but possessing no gemological relation to diamond and minimal monetary value.
Cut Quality
Fair to Poor (artisan or experimental hand-cut block with irregular facet symmetry)
Brilliance
Low to Moderate white light return due to wide-angle facets and internal fractures
Fire
Extremely high artificial fire/rainbow effect caused by a thin metallic vapor deposition coating (mystic coating)
Scintillation
Scattered and distorted due to internal fractures and non-standard facet alignment
Proportions
Non-standard block proportions; very deep with large table-like top facet
Symmetry
Poor (asymmetric facet junctions and blocky geometry)
Polish
Moderate to Good surface polish showing some abrasion and wear
Fluorescence
Strong artificial iridescent play-of-color due to thin-film coating
Inclusions
Large feather fractures, internal conchoidal fracture lines, and potential gas bubbles indicating synthetic glass manufacture
Blemishes
Surface scratches, edge abrasions, and wear marks on facet junctions
Origin
Laboratory created / man-made treated glass or coated quartz crystal
Treatment Detection
Definite signs of thin-film surface coating (mystic coating) creating rainbow iridescence, and internal conchoidal fractures typical of glass
Estimated Value
Nominal decorative or mineral specimen value ($10 - $50 USD)
Certification Estimate
Not eligible for certification by major diamond grading labs (GIA, AGS, IGI) as it is not diamond and likely not a natural precious gemstone
Investment Potential
None; decorative item with no resale appreciation value
Similar Diamonds
None (no similarity to genuine diamond in optical properties, hardness, or composition)
Setting Suggestions
Not recommended for standard fine jewelry settings; suitable only as a wire-wrapped ornamental display piece or decorative paperweight
Care & Maintenance
Avoid harsh chemicals, ultrasonic cleaners, and abrasive surfaces which will strip the delicate surface coating; clean gently with mild soap and warm water
Interesting Facts
The rainbow effect is produced by coating the pavilion or surface with a microscopic layer of titanium or other metals, a technique popularized in the late 1990s known as 'mystic' treatment