NAME OF STONE. | TWIN COLORS. | |
|---|---|---|
| Sapphire (blue) | Greenish straw | Blue |
| Ruby (red) | Aurora red | Carmine red |
| Tourmaline (red) | Salmon | Rose pink |
| "(brownish red) | Umber brown | Columbine pink |
| "(brown) | Orange brown | Greenish yellow |
| "(green) | Pistachio green | Bluish green |
| "(blue) | Greenish gray | Indigo blue |
| Emerald (green) | Yellowish green | Bluish green |
| Topaz (sherry) | Straw yellow | Rose pink |
| Peridot (pistachio) | Brown yellow | Sea green |
| Aquamarine (sea green) | Straw white | Gray blue |
| Beryl (pale blue) | Sea green | Azure blue |
| Chrysoberyl (yellow) | Golden brown | Greenish yellow |
| Iolite (lavender) | Pale buff | Indigo blue |
| Amethyst (purple) | Reddish purple | Bluish purple |
Colors.
The following is a partial list of the colors of precious stones:
Shades of White.—Quartz, opal, chalcedony.
Shades of Gray.—Labrador, smoky topaz, chalcedony, zircon.
Black.—Obsidian, tourmaline, jet.
Shades of Blue.—Lapis-lazuli, amethyst, chalcedony, spinel, zircon, sapphire, cyanite, tourmaline, turquois, odontolite, fluor spar.
Shades of Green.—Amazon stone, turquois, prase, beryl, blood-stone, epidote, emerald, malachite, chrysoprase, chrysolite, idocrase, olivine, garnet, chrysoberyl.
Shades of Yellow.—Opal, amber, topaz, beryl, jasper.