A B C – D E F G H – I J K L M N O P – Q R S T U V W X Y Z
Q R S T U V W X Y Z
| Gemstone | Hardness |
|---|---|
| Quartz | 7 |
| Red Beryl | 7½-8 |
| Rhodizite | 8-8½ |
| Rock Crystal | 7 |
| Ruby | 9 |
| Rutile | 6-6 ½ |
| Sanidine | 6-6 ½ |
| Sapphire | 9 |
| Sapphirine | 7 ½ |
| Schorlomite | 7-7 ½ |
| Sekaninaite | 7-7 ½ |
| Serendibite | 6 ½ -7 |
| Sillimanite | 6 ½ -7 ½ |
| Simponsite | 7-7 ½ |
| Sinhalite | 6 ½ -7 |
| Smaragdite | 6-6 ½ |
| Sogdianite | 6-7 |
| Spessartine | 7-7 ½ |
| Spinel | 8 |
| Spodumene | 6 ½ -7 |
| Staurolite | 7-7 ½ |
| Sugilite | 6-6 ½ |
| Taaffeite | 8-8½ |
| Talc | 1 |
| Tantalite | 6-6 ½ |
| Tanzanite | 6 ½ -7 |
| Thorianite | 6 ½ -7 |
| Tinzenite | 6 ½ -7 |
| Topaz | 8 |
| Tourmaline | 7-7 ½ |
| Tephroite | 6 |
| Uvarovite | 7-7 ½ |
| Vesuvianite | 6 ½ |
| Vlasovite | 6 |
| Xonolite | 6-6 ½ |
| YAG | 8½ |
| Zektzerite | 6 |
| Zircon | 6 ½ -7 ½ |
| Zirconia | 8½ |
| Zoisite | 6-6 ½ |
| Zunyite | 7 |
Source: Gemstones of the World (5th edition), Walter Schumann
Images: National Park Service [Public domain], via Wikimedia Commons
