Identification guide · Minerals
How to Identify Goshenite
Goshenite forms hexagonal prisms with a glassy, vitreous luster, a colorless to faint white streak, and, true to its name, an absence of significant body color, sometimes showing only a faint gray or pale yellow tint. Hardness of 7.5 to 8 and a lack of visible cleavage, paired with conchoidal fracture, help separate it from softer colorless look-alikes such as quartz or topaz once other properties are checked. Because it closely resembles clear quartz, careful attention to crystal habit, hexagonal rather than quartz's trigonal prisms with pyramidal terminations, is often needed to confirm the identification.
Goshenite identification checklist
| Color | Colorless, White | Look at a clean, dry surface in daylight. Color zoning, banding or spots are as diagnostic as the hue. |
|---|---|---|
| Luster | Vitreous | Fresh surfaces shine like glass; a dull surface usually means weathering, so chip or wet a corner. |
| Transparency | Transparent | Hold a thin edge up to a bright light and note whether light passes through. |
| Mohs hardness | 7.5–8 | It scratches glass, steel and even quartz; only harder gems will mark it. |
| Streak | White | Drag a corner across unglazed porcelain (the back of a bathroom tile) and check the powder color. |
| Cleavage | Imperfect basal | |
| Fracture | Conchoidal | Broken surfaces show smooth, curved, shell-like scoops. |
| Specific gravity | 2.65–2.8 | Ordinary rock-like heft (specific gravity about 2.7249999999999996), similar to quartz. |
| Crystal system | Hexagonal |
Extra tests for Goshenite
Glass check. Goshenite shares a glassy luster and conchoidal fracture with man-made glass. Glass sits near Mohs 5.5 and often contains round gas bubbles, so a hardness test and a hand lens separate them.
Goshenite look-alikes and how to tell them apart
Both sit near Mohs 7.5–8, so a scratch test alone will not separate them. Lean on luster, streak and heft instead. Goshenite vs Beryl →
Goshenite is harder (Mohs 7.5–8) than Calcite (Mohs 3), so Goshenite will scratch Calcite and not the other way round. A copper coin (Mohs 3.5) scratches it, but a fingernail does not. Goshenite vs Calcite →
Goshenite is harder (Mohs 7.5–8) than Feldspar (Mohs 6–6.5), so Goshenite will scratch Feldspar and not the other way round. It is about as hard as window glass: a knife barely marks it, while a steel file (Mohs 6.5) will. Goshenite vs Feldspar →
Both sit near Mohs 7.5–8, so a scratch test alone will not separate them. Lean on luster, streak and heft instead.
Goshenite identification FAQ
How can you tell if a rock is Goshenite?
Check the color (colorless and white), the vitreous luster, a Mohs hardness of 7.5–8 and a white streak. Photographing it with the StoneSnap app gives a match in seconds.
What is the hardness of Goshenite?
Goshenite has a Mohs hardness of 7.5–8. It scratches glass, steel and even quartz; only harder gems will mark it.
What is the difference between Goshenite and Beryl?
Goshenite (Mohs 7.5–8, vitreous luster) and Beryl (Mohs 7.5–8, vitreous luster) look alike, but hardness, streak and heft usually separate them. See the full Goshenite vs Beryl comparison for a side-by-side table.
Is Goshenite worth anything?
Entry-level Goshenite specimens sell for around $2, typical collector pieces about $20, and premium examples $150 or more depending on size, quality and locality.
What color is Goshenite?
Goshenite is most often colorless and white. Color varies with impurities and locality, so confirm with hardness and luster rather than color alone.
