 | Amber
1.08 (+/- .02) |
| Opal
2.15 (-.90,+.07) |
| Glass
2.3 to 4.5 |
| Obsidian
2.40 (-.07,+.10) |
| Orthoclase
2.56 (+/-.01) |
| Iolite
2.61 (+/-.05) |
| Quartz & Syn.
2.66 (+/-.01) |
| Syn. Emerald (hydro)2.68 +/- .02, (Gilson) 2.67+/-.02, (flux)2.66 |
| Scapolite
2.68 (+/-.06) |
| Calcite
2.70 |
| Pearl
2.70 (-.02, +.15) |
| Beryl
2.72 (-.05,+.12) |
| Turquoise
2.76 (-.45,+.08) |
| Tourmaline
3.06 (-.05,+.15) |
| Andalusite
3.17 (+/-.04) |
| Spodumene
3.18 (+/-.03) |
| Fluorite
3.18 (+/-.02) |
| Zoisite
3.30 (+/-.10) |
| Jadeite
3.34 (+/-.04) |
| Peridot
3.34 (-.03, +.14) |
| Diamond
3.52 (+/-.01) |
| Topaz
3.53 (+/-.04) |
| Spinel
3.60 (-.03,+.30) |
| Grossularite
3.61 (-.27,+.12) |
| Benitoite
3.64 (+/-.03) |
| Syn. Spinel
3.64 (-.12,+.02) |
| Chrysoberyl
3.73 (+/-.02) |
| Pyrope
3.78 (-.16,+.09) |
| Rhodolite
3.84 (+/-.10) |
| Corundum & Syn.
4.00 (+/-.03) |
| Zircon (low)
4.00 (+/-.07) |
| Sphalerite
4.05 (+/-.02) |
| Almandite
4.05 (+/-.12) |
| Spessartite
4.15 (+/-.03) |
| Rutile & Syn.
4.26 (+/-.02) |
| YAG
4.55 |
| Zircon (med)
4.32 (+/-.25) |
| Zircon (high)
4.70 (+/-.03) |
| Pyrite
5.00 (+/-.10) |
| Hematite
5.70 |
| CZ
5.80 (+/-.20) |
| GGG
7.02 (+/-.07) |
![[Under Construction]](images/undercon.gif){kind=small}
