Identification guide · Minerals
How to Identify Rhodonite
Rhodonite is usually pink, rose, and pink with black veins with a vitreous luster and is translucent. It has a Mohs hardness of 6. It is about as hard as window glass: a knife barely marks it, while a steel file (Mohs 6.5) will. Its streak is white. It is most often confused with Quartz, Tourmaline, and Opal; the tests below separate them.
Rhodonite identification checklist
| Color | Pink, Rose, Pink with black veins | 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 | Translucent | Hold a thin edge up to a bright light and note whether light passes through. |
| Mohs hardness | 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 | |
| Fracture | Conchoidal | Broken surfaces show smooth, curved, shell-like scoops. |
| Specific gravity | 3.6 | Heavier than it looks (specific gravity about 3.6). |
| Crystal system | Triclinic |
Extra tests for Rhodonite
Glass check. Rhodonite 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.
Rhodonite look-alikes and how to tell them apart
Quartz is harder (Mohs 7) than Rhodonite (Mohs 6), so Quartz will scratch Rhodonite 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. Rhodonite vs Quartz →
Tourmaline is harder (Mohs 7–7.5) than Rhodonite (Mohs 6), so Tourmaline will scratch Rhodonite 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. Rhodonite vs Tourmaline →
Both sit near Mohs 6, so a scratch test alone will not separate them. Lean on luster, streak and heft instead. Rhodonite vs Opal →
Rhodonite is harder (Mohs 6) than Kyanite (Mohs 5), so Rhodonite will scratch Kyanite and not the other way round. A steel knife blade (Mohs 5.5) scratches it; a copper coin does not.
Field tips
- Check whether the specimen's color and texture match typical Rhodonite examples.
- Use hardness, streak, luster, grain size, and locality together; no single trait is enough for every specimen.
Rhodonite identification FAQ
How can you tell if a rock is Rhodonite?
Check the color (pink, rose, and pink with black veins), the vitreous luster, a Mohs hardness of 6 and a white streak. Photographing it with the StoneSnap app gives a match in seconds.
What is the hardness of Rhodonite?
Rhodonite has a Mohs hardness of 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 Rhodonite and Quartz?
Rhodonite (Mohs 6, vitreous luster) and Quartz (Mohs 7, vitreous, greasy on fracture surfaces luster) look alike, but hardness, streak and heft usually separate them. See the full Rhodonite vs Quartz comparison for a side-by-side table.
Is Rhodonite worth anything?
Entry-level Rhodonite specimens sell for around $5, typical collector pieces about $30, and premium examples $200 or more depending on size, quality and locality.
What color is Rhodonite?
Rhodonite is most often pink, rose, and pink with black veins. Color varies with impurities and locality, so confirm with hardness and luster rather than color alone.
