Comparison · Minerals
Erythrite vs Lepidolite
Erythrite and Lepidolite are easy to confuse because both are minerals. Both sit near Mohs 1.5–2.5, so a scratch test alone will not separate them. Lean on luster, streak and heft instead. Below is a side-by-side comparison of their properties and the quick tests that separate them.
Key differences between Erythrite and Lepidolite
- Both sit near Mohs 1.5–2.5, so a scratch test alone will not separate them. Lean on luster, streak and heft instead.
- Streak color differs: Erythrite leaves a pale pink to pale red streak on unglazed porcelain, Lepidolite leaves white.
- Luster is different: Erythrite is vitreous, pearly on cleavage, silky while Lepidolite is pearly.
- Hold a thin edge to the light: Erythrite is Transparent to translucent, Lepidolite is translucent.
- They overlap in pink and purple, but Erythrite also comes in red.
- Well-formed crystals give it away: Erythrite is Monoclinic, Lepidolite is monoclinic.
Erythrite vs Lepidolite properties
| Property | Erythrite | Lepidolite |
|---|---|---|
| Type | Minerals | Minerals |
| Mohs hardness | 1.5–2.5 | 2.5 |
| Luster | Vitreous, pearly on cleavage, silky | pearly |
| Streak | Pale pink to pale red | White |
| Transparency | Transparent to translucent | translucent |
| Specific gravity | 3.06–3.18 | 2.85 |
| Crystal system | Monoclinic | monoclinic |
| Common colors | Pink, Crimson red, Purple-red | Pink, Purple, Lilac, Rose |
| Rarity | common | uncommon |
| Typical specimen value | $2–$150+ | $5–$100+ |
Which is more valuable?
Typical specimens of Erythrite and Lepidolite trade in a similar range, around $20.
About Erythrite
Erythrite is a hydrous cobalt arsenate, Co3(AsO4)2 8H2O, crystallizing in the monoclinic system with a vivid pink to crimson color that made it a prized prospecting clue. Long nicknamed cobalt bloom or cobalt flower, it forms as a secondary mineral where cobalt-bearing ores have been exposed to oxidizing, weathering conditions. Its bright coloring and soft, often earthy texture make it easy to spot even in small amounts.
About Lepidolite
Lepidolite is a pink to purple lithium-bearing mica. It's an important source of lithium and valued for its soft lavender color.
Erythrite vs Lepidolite FAQ
Is Erythrite the same as Lepidolite?
No. Both are minerals, but they are distinct species with different hardness, streak or luster. Both sit near Mohs 1.5–2.5, so a scratch test alone will not separate them. Lean on luster, streak and heft instead.
How can you tell Erythrite from Lepidolite?
Both sit near Mohs 1.5–2.5, so a scratch test alone will not separate them. Lean on luster, streak and heft instead. Streak color differs: Erythrite leaves a pale pink to pale red streak on unglazed porcelain, Lepidolite leaves white. Luster is different: Erythrite is vitreous, pearly on cleavage, silky while Lepidolite is pearly.
Which is harder, Erythrite or Lepidolite?
Lepidolite is harder: Mohs 2.5 against Mohs 1.5–2.5 for Erythrite.
Which is more valuable, Erythrite or Lepidolite?
Typical specimens of Erythrite and Lepidolite trade in a similar range, around $20.
