Blue gemstones
14 stones on this site fall in the blue color family. Some stones span more than one family — a stone with a wide color range, like tourmaline or sapphire, may also appear on other color pages.
| Stone | Mohs hardness | Variety of |
|---|---|---|
| Aquamarine | 7.5–8 | beryl |
| Beryl | 7.5–8 | — |
| Iolite | 7–7.5 | cordierite |
| Labradorite | 6–6.5 | plagioclase feldspar |
| Lapis Lazuli | 5–6 | — |
| Larimar | 4.5–5 | pectolite |
| Moonstone | 6–6.5 | orthoclase feldspar |
| Sapphire | 9 | corundum |
| Spinel | 8 | — |
| Tanzanite | 6–7 | zoisite |
| Topaz | 8 | — |
| Tourmaline | 7–7.5 | — |
| Turquoise | 5–6 | — |
| Zircon | 6–7.5 | — |