Azurite
| Colour | Blue |
|---|---|
| Mohs hardness | 3.5 to 4 |
| Lustre | Vitreous |
| Streak | Light blue |
| Crystal system | Monoclinic |
| Transparency | Transparent to translucent |
| Cleavage | Perfect on , fair on , poor on |
| Fracture | Conchoidal |
| Chemical formula | Cu 3 (CO 3 ) 2 (OH) 2 |
| Specific gravity | 3.773 (measured), 3.78 (calculated) |
What is Azurite?
Azurite or Azure spar is a soft, deep-blue copper mineral produced by weathering of copper ore deposits. During the early 19th century, it was also known as chessylite, after the type locality at Chessy near Lyon, France. The mineral, a basic carbonate with the chemical formula Cu3(CO3)2(OH)2, has been known since ancient times, and was mentioned in Pliny the Elder's Natural History under the Greek name kuanos (κυανός: "deep blue," root of English cyan) and the Latin name caeruleum. Copper (Cu2+) gives it its deep blue color.
How to identify Azurite
- Lustre: Vitreous.
- Hardness: Mohs 3.5 to 4 — soft; a knife will scratch it.
- Streak: Light blue.
- Habit: Monoclinic crystal system.
Azurite value
Based on 100 recent eBay sold listings, a raw / cluster Azurite typically sells for $11–$26 (about $0.04–$0.13 per gram for raw material). After eBay fees a seller nets roughly $14 on a median piece.
| Recently sold | Weight | Sold | Date |
|---|---|---|---|
| 250G Best Natural Azurite/Malachite crystal minerals specimens | 250 g | $15 | 2026-06-21 |
| 284G Best Natural Azurite/Malachite raw Crystal Mineral Specimen | 284 g | $13 | 2026-06-21 |
| 22.05Ct Bi Color Azurite Malachite Chrysocolla Natural Cab USAZ77 | 4 g | $16 | 2026-06-21 |
| 18G BEST Natural Azurite/Malachite crystal minerals specimens | 18 g | $26 | 2026-06-21 |
| 172G BEST Natural Azurite/Malachite crystal minerals specimens | 172 g | $16 | 2026-06-21 |
| 2.48LB Best Natural Azurite/Malachite raw Crystal Mineral Specimen | 1125 g | $24 | 2026-06-21 |
Typical recently-sold prices, 2026-06. Condition, size and quality vary widely, so this is an estimate, not an appraisal. See current sold listings on eBay ↗. Full value guide · how we work this out.
