Sapphire is a blue variety:

of agate
of chalcedony
of corundum
of jasper
Sapphire is a gemstone, a variety of the mineral corundum, an aluminium. It is typically blue in color, but natural "fancy" sapphires also occur in yellow, purple, orange, and green colors. Pink colored corundum may be either classified as ruby or sapphire depending on locale.
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Answers by country

of agate
of chalcedony
of corundum
of jasper
answers
flagIndia
4%
11%
75%
8%
69
flagthe Philippines
8%
8%
66%
16%
12
flagSwitzerland
0%
9%
63%
18%
11
flagCanada
18%
27%
54%
0%
11
flagAustralia
15%
25%
50%
10%
20
flagUkraine
12%
22%
45%
19%
31
flagGermany
24%
18%
42%
14%
135
flagthe United Kingdom
18%
21%
42%
18%
33
flagPoland
26%
21%
39%
12%
2040
flagthe United States
26%
18%
38%
13%
75
flagAustria
23%
29%
35%
11%
17
flagGreece
16%
27%
33%
22%
18