gemstone

Champagne topaz (likely)

Topaz, Al₂SiO₄(F,OH)₂

AI-generated identification · may be incorrect

Small transparent, rectangular step-cut gem with pale honey/Champagne color and vitreous luster. Topaz has Mohs hardness 8, orthorhombic crystals, perfect basal cleavage, and specific gravity about 3.5–3.6. A photo cannot exclude citrine, treated quartz, or synthetic glass.

Identified September 8, 2026More gemstone →

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Physical properties

Formation & geological history

Topaz forms in fluorine-rich granitic pegmatites and hydrothermal cavities, commonly during late Precambrian to Paleozoic granite emplacement. Minas Gerais, Brazil—near the reported location—is world-famous for topaz and related pegmatite gemstones.

Uses & applications

Used primarily as a faceted gemstone; clear or strongly colored specimens are collectible. Industrial use is limited because cleavage makes it prone to splitting during cutting.

Geological facts

The golden color may be natural or irradiation/heat enhanced; blue topaz is commonly treated. Topaz is substantially harder than quartz but can cleave if struck.

Field identification & locations

Look for sharp orthorhombic crystal forms, high brilliance, and resistance to scratching by quartz; avoid testing on the polished facet. Confirm with refractive index (about 1.619–1.627), birefringence, and a gemological refractometer. Regional occurrence is highly plausible for Minas Gerais.