Feldspar
| Name | Feldspar |
| Chemical Formula | Na(AlSi3O8),Ca(Al2Si2O8) |
| Mohs Hardness | 6 - 6.5 |
| Density | 2.70 |
| Streak | White |
| Luster | Vitreous |
| Refractive Index | 1.55 - 1.57 |
| Color | colorless, greens, blues, pale yellowish browns, reds |
| Gem Types | Labradorite Sunstone Oregon Sunstone |
