Comparison · Minerals
Lepidolite vs Satin Spar
Lepidolite and Satin Spar are easy to confuse because both are minerals. Both sit near Mohs 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 Lepidolite and Satin Spar
- Both sit near Mohs 2.5, so a scratch test alone will not separate them. Lean on luster, streak and heft instead.
- Lepidolite feels noticeably heavier for its size (specific gravity 2.85 versus 2.3 for Satin Spar).
- They overlap in pink, but Lepidolite also comes in purple and Satin Spar also comes in clear.
Lepidolite vs Satin Spar properties
| Property | Lepidolite | Satin Spar |
|---|---|---|
| Type | Minerals | Minerals |
| Mohs hardness | 2.5 | 2 |
| Luster | pearly | silky |
| Streak | White | White |
| Transparency | translucent | translucent |
| Specific gravity | 2.85 | 2.3 |
| Crystal system | monoclinic | monoclinic |
| Common colors | Pink, Purple, Lilac, Rose | White, Cream, Colorless, Peach |
| Rarity | uncommon | common |
| Typical specimen value | $5–$100+ | $5–$120+ |
Which is more valuable?
Typical specimens of Lepidolite and Satin Spar trade in a similar range, around $20.
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.
About Satin Spar
Satin Spar is a fibrous variety of gypsum recognized by its silky sheen, white to cream color, and soft hardness.
Lepidolite vs Satin Spar FAQ
Is Lepidolite the same as Satin Spar?
No. Both are minerals, but they are distinct species with different hardness, streak or luster. Both sit near Mohs 2.5, so a scratch test alone will not separate them. Lean on luster, streak and heft instead.
How can you tell Lepidolite from Satin Spar?
Both sit near Mohs 2.5, so a scratch test alone will not separate them. Lean on luster, streak and heft instead. Lepidolite feels noticeably heavier for its size (specific gravity 2.85 versus 2.3 for Satin Spar). They overlap in pink, but Lepidolite also comes in purple and Satin Spar also comes in clear.
Which is harder, Lepidolite or Satin Spar?
Lepidolite is harder: Mohs 2.5 against Mohs 2 for Satin Spar.
Which is more valuable, Lepidolite or Satin Spar?
Typical specimens of Lepidolite and Satin Spar trade in a similar range, around $20.
