Identification guide · Minerals
How to Identify Charoite
Charoite shows a lavender to violet-purple color, often swirled with white, gray, or black patches, with a silky to pearly luster caused by its fibrous crystal structure. Its streak is white to pale lilac, hardness falls around 5 to 6, and it lacks a distinct single cleavage, instead showing a fibrous, splintery fracture. The intertwined, chatoyant fiber texture visible under light is the best identifying feature, distinguishing it from imitations like dyed quartzite. It is sometimes confused with sugilite because of similar coloring.
Charoite identification checklist
| Color | Lilac, Purple, Violet with white/black veining | Look at a clean, dry surface in daylight. Color zoning, banding or spots are as diagnostic as the hue. |
|---|---|---|
| Luster | Vitreous to pearly/silky | Fresh surfaces shine like glass; a dull surface usually means weathering, so chip or wet a corner. |
| Transparency | Translucent to opaque | Hold a thin edge up to a bright light and note whether light passes through. |
| Mohs hardness | 5–6 | It is about as hard as window glass: a knife barely marks it, while a steel file (Mohs 6.5) will. |
| Streak | White | Drag a corner across unglazed porcelain (the back of a bathroom tile) and check the powder color. |
| Cleavage | Perfect in two directions | |
| Fracture | Uneven to splintery | |
| Specific gravity | 2.54–2.68 | Ordinary rock-like heft (specific gravity about 2.6100000000000003), similar to quartz. |
| Crystal system | Monoclinic |
Charoite look-alikes and how to tell them apart
Both sit near Mohs 5–6, so a scratch test alone will not separate them. Lean on luster, streak and heft instead. Charoite vs Diopside →
Quartz is harder (Mohs 7) than Charoite (Mohs 5–6), so Quartz will scratch Charoite 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. Charoite vs Quartz →
Onyx is harder (Mohs 6.5–7) than Charoite (Mohs 5–6), so Onyx will scratch Charoite 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. Charoite vs Onyx →
Jadeite is harder (Mohs 6.75) than Charoite (Mohs 5–6), so Jadeite will scratch Charoite 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.
Charoite identification FAQ
How can you tell if a rock is Charoite?
Check the color (lilac, purple, and violet with white/black veining), the vitreous to pearly/silky luster, a Mohs hardness of 5–6 and a white streak. Photographing it with the StoneSnap app gives a match in seconds.
What is the hardness of Charoite?
Charoite has a Mohs hardness of 5–6. It is about as hard as window glass: a knife barely marks it, while a steel file (Mohs 6.5) will.
What is the difference between Charoite and Diopside?
Charoite (Mohs 5–6, vitreous to pearly/silky luster) and Diopside (Mohs 5.5–6.5, vitreous luster) look alike, but hardness, streak and heft usually separate them. See the full Charoite vs Diopside comparison for a side-by-side table.
Is Charoite worth anything?
Entry-level Charoite 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 Charoite?
Charoite is most often lilac, purple, and violet with white/black veining. Color varies with impurities and locality, so confirm with hardness and luster rather than color alone.
