$150Median
3Sold (12 mo)
$150Last sale
Clinoclase specimens for sale
24 for sale · $175–$8,000 USD
53 in the gallery
Clinoclase is a copper arsenate mineral that forms small, well-formed crystals and masses in fractures and cavities. It typically occurs with a silky to adamantine lustre and can display a bottle-green to olive-brown color, sometimes with a faint blue-green hue in certain light. Habit ranges from tabular to prismatic and it is commonly found as granular aggregates in oxidized zones of copper-arsenate bearing rocks.
- Formula
- Cu3(AsO4)(OH)3
- Rarity
- Rare
- Stability
- Moderately Stable
- Collector interest
- High Interest
- Classification notes
- Arsenate hydroxide; Strunz 8.BE arsenates with additional anions, without H2O
Key characteristics
- Crystal system
- monoclinic
- Mohs hardness
- 2.5–3
- Specific gravity
- 4.3–4.4
- Luster
- vitreous, silky
- Transparency
- transparent, translucent, opaque
- Color
- green, blue, black
- Streak
- green, blue
- Cleavage
- perfect
- Fracture
- uneven
- Crystal habit
- prismatic, bladed, acicular, radiating, druzy, granular, massive
- Classic / historic
Buy Clinoclase specimens
View all 24Where Clinoclase is found
Top localities
- Wheal Gorland14 specimens
- Kouri 1 diggings7 specimens
- Tintic Mining District6 specimens
- Mammoth mine5 specimens
- Clara Mine2 specimens
- Ajax Mine1 specimen
- Gwennap1 specimen
- Mammoth1 specimen
- Wheal Unity1 specimen
- St Day1 specimen
About Clinoclase
Notable specimens have come from historic copper mines and secondary deposits in the United States, United Kingdom, and Germany, with additional finds in Slovakia and Mali. Collectors value clinoclase for its rich color, crystal integrity, and the contrast it provides when paired with other copper minerals. Its relative rarity in high-quality crystals and its association with well-documented mineral localities add to its appeal for cabinet display and educational study.
