Comparison · Minerals
Aurichalcite vs Chrysocolla
Aurichalcite and Chrysocolla are easy to confuse because both are minerals. Chrysocolla is harder (Mohs 2.5) than Aurichalcite (Mohs 1–2), so Chrysocolla will scratch Aurichalcite and not the other way round. A fingernail (Mohs 2.5) scratches it easily. Below is a side-by-side comparison of their properties and the quick tests that separate them.
Key differences between Aurichalcite and Chrysocolla
- Chrysocolla is harder (Mohs 2.5) than Aurichalcite (Mohs 1–2), so Chrysocolla will scratch Aurichalcite and not the other way round. A fingernail (Mohs 2.5) scratches it easily.
- Streak color differs: Aurichalcite leaves a pale blue-green streak on unglazed porcelain, Chrysocolla leaves white to pale blue.
- Luster is different: Aurichalcite is silky, pearly while Chrysocolla is vitreous.
- Aurichalcite feels noticeably heavier for its size (specific gravity 3.6–3.9 versus 2.2 for Chrysocolla).
- Hold a thin edge to the light: Aurichalcite is Translucent, Chrysocolla is translucent.
- Well-formed crystals give it away: Aurichalcite is Monoclinic, Chrysocolla is orthorhombic.
Aurichalcite vs Chrysocolla properties
| Property | Aurichalcite | Chrysocolla |
|---|---|---|
| Type | Minerals | Minerals |
| Mohs hardness | 1–2 | 2.5 |
| Luster | Silky, pearly | vitreous |
| Streak | Pale blue-green | White to pale blue |
| Transparency | Translucent | translucent |
| Specific gravity | 3.6–3.9 | 2.2 |
| Crystal system | Monoclinic | orthorhombic |
| Common colors | Pale green, Blue-green, Sky blue | Blue-Green, Cyan, Turquoise Blue |
| Rarity | common | common |
| Typical specimen value | $2–$150+ | $5–$150+ |
Which is more valuable?
Chrysocolla is usually the more valuable of the two: a typical collector specimen runs about $25 against $20 for Aurichalcite, and premium Chrysocolla can reach $150 or more.
About Aurichalcite
Aurichalcite is a hydrated zinc copper carbonate, (Zn,Cu)5(CO3)2(OH)6, that forms as a secondary mineral in the weathered, oxidized portions of zinc and copper ore bodies. It typically appears as delicate, pale blue-green sprays of needle-like crystals with a distinctly pearly luster. The name derives from Greek words for gold and copper, an old and somewhat misleading reference to brass-like alloys rather than the mineral's actual color.
About Chrysocolla
Chrysocolla is a vibrant blue-green copper mineral often confused with turquoise. When mixed with quartz, it's hard enough for jewelry.
Aurichalcite vs Chrysocolla FAQ
Is Aurichalcite the same as Chrysocolla?
No. Both are minerals, but they are distinct species with different hardness, streak or luster. Chrysocolla is harder (Mohs 2.5) than Aurichalcite (Mohs 1–2), so Chrysocolla will scratch Aurichalcite and not the other way round. A fingernail (Mohs 2.5) scratches it easily.
How can you tell Aurichalcite from Chrysocolla?
Chrysocolla is harder (Mohs 2.5) than Aurichalcite (Mohs 1–2), so Chrysocolla will scratch Aurichalcite and not the other way round. A fingernail (Mohs 2.5) scratches it easily. Streak color differs: Aurichalcite leaves a pale blue-green streak on unglazed porcelain, Chrysocolla leaves white to pale blue. Luster is different: Aurichalcite is silky, pearly while Chrysocolla is vitreous.
Which is harder, Aurichalcite or Chrysocolla?
Chrysocolla is harder: Mohs 2.5 against Mohs 1–2 for Aurichalcite.
Which is more valuable, Aurichalcite or Chrysocolla?
Chrysocolla is usually the more valuable of the two: a typical collector specimen runs about $25 against $20 for Aurichalcite, and premium Chrysocolla can reach $150 or more.
