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
flagAustria
14%
71%
0%
14%
14
flagGermany
10%
66%
4%
18%
130
flagAustralia
8%
64%
24%
4%
25
flagRepublic of Ireland
0%
63%
18%
18%
11
flagUkraine
20%
62%
12%
4%
24
flagPoland
11%
59%
4%
24%
9959
flagSwitzerland
20%
53%
0%
26%
15
flagthe United States
22%
46%
13%
18%
76
flagIndia
11%
41%
13%
32%
43
flagGreece
47%
41%
5%
5%
17
flagthe United Kingdom
18%
40%
12%
26%
49
flagUnknown
31%
37%
6%
25%
16