Comparison · Minerals
Desert Rose vs Gypsum
Desert Rose and Gypsum are easy to confuse because both are minerals. Both sit near Mohs 2, 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 Desert Rose and Gypsum
- Both sit near Mohs 2, so a scratch test alone will not separate them. Lean on luster, streak and heft instead.
- Luster is different: Desert Rose is pearly while Gypsum is vitreous, pearly, or silky (fibrous), earthy when massive.
- Hold a thin edge to the light: Desert Rose is translucent, Gypsum is Transparent to translucent.
- They overlap in brown, but Desert Rose also comes in white and Gypsum also comes in clear, gray, yellow, and pink.
- Well-formed crystals give it away: Desert Rose is monoclinic, Gypsum is Monoclinic.
Desert Rose vs Gypsum properties
| Property | Desert Rose | Gypsum |
|---|---|---|
| Type | Minerals | Minerals |
| Mohs hardness | 2 | 2 |
| Luster | pearly | Vitreous, pearly, or silky (fibrous), earthy when massive |
| Streak | White | White |
| Transparency | translucent | Transparent to translucent |
| Specific gravity | 2.3 | 2.3–2.35 |
| Crystal system | monoclinic | Monoclinic |
| Common colors | Tan, Brown, Cream, White | Colorless, White, Gray, Yellow, Brown, Pink |
| Rarity | common | common |
| Typical specimen value | $5–$150+ | $2–$150+ |
Which is more valuable?
Typical specimens of Desert Rose and Gypsum trade in a similar range, around $20.
About Desert Rose
Desert Rose is a rosette-shaped gypsum or barite aggregate with sand inclusions, recognized by petal-like crystal blades.
About Gypsum
Gypsum is a soft, common evaporite mineral, calcium sulfate dihydrate with the formula CaSO4·2H2O, that defines hardness 2 on the Mohs scale and can be scratched with a fingernail. It precipitates from evaporating saline water and occurs in forms ranging from transparent selenite crystals to fibrous satin spar and massive alabaster. Gypsum is also the principal raw material used to manufacture plaster of Paris and drywall.
Desert Rose vs Gypsum FAQ
Is Desert Rose the same as Gypsum?
No. Both are minerals, but they are distinct species with different hardness, streak or luster. Both sit near Mohs 2, so a scratch test alone will not separate them. Lean on luster, streak and heft instead.
How can you tell Desert Rose from Gypsum?
Both sit near Mohs 2, so a scratch test alone will not separate them. Lean on luster, streak and heft instead. Luster is different: Desert Rose is pearly while Gypsum is vitreous, pearly, or silky (fibrous), earthy when massive. Hold a thin edge to the light: Desert Rose is translucent, Gypsum is Transparent to translucent.
Which is harder, Desert Rose or Gypsum?
They are about equally hard, both near Mohs 2.
Which is more valuable, Desert Rose or Gypsum?
Typical specimens of Desert Rose and Gypsum trade in a similar range, around $20.
