What gemstone is this?

azurite
malachite
cinnabar
turquoise
Malachite is a copper carbonate hydroxide mineral, with the formula Cu2CO3(OH)2. This opaque, green banded mineral crystallizes in the monoclinic crystal system, and most often forms botryoidal, fibrous, or stalagmitic masses, in fractures and spaces, deep underground.
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Very interesting!
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Answers by country

azurite
malachite
cinnabar
turquoise
answers
flagIraq
10%
90%
0%
0%
10
flagGermany
12%
66%
6%
14%
48
flagPoland
11%
58%
4%
24%
9221
flagIndia
6%
48%
13%
31%
29
flagthe United States
28%
42%
2%
26%
38
flagthe United Kingdom
21%
39%
4%
34%
23
flagUnknown
31%
37%
6%
25%
16