|
| TABLE 3 | ||||
| VALUE OF U.S. GEMSTONE PRODUCTION, BY TYPE1 | ||||
| (Thousand dollars) | ||||
| Gem materials | 2004 | 2005 | ||
| Beryl | 18 | 48 | ||
| Coral, all types | 261 | 216 | ||
| Diamond | (2) | (2) | ||
| Garnet | 207 | 46 | ||
| Gem feldspar | 659 | 626 | ||
| Geode/nodules | 212 | 214 | ||
| Opal | 137 | 140 | ||
| Quartz: | ||||
| Macrocrystalline3 | 206 | 196 | ||
| Cryptocrystalline4 | 383 | 427 | ||
| Sapphire/ruby | 473 | 450 | ||
| Shell | 4,000 | 3,560 | ||
| Topaz | (2) | (2) | ||
| Tourmaline | 45 | 39 | ||
| Turquoise | 699 | 511 | ||
| Other | 7,170 | r | 6,960 | |
| Total | 14,500 | 13,400 | ||
| See footnotes at end of table. | ||||
| TABLE 3�Continued | ||||
| VALUE OF U.S. GEMSTONE PRODUCTION, BY TYPE1 | ||||
| rRevised. | ||||
| 1Data are rounded to no more than three significant digits; may | ||||
| not add to totals shown. | ||||
| 2Included with "Other."� | ||||
| 3Macrocrystalline quartz (crystals recognizable with the naked | ||||
| eye) includes amethyst, amethyst quartz, aventurine, blue quartz, | ||||
| citrine, hawk's eye, pasiolite, prase, quartz cat's eye, rock crystal, | ||||
| rose quartz, smoky quartz, and tiger's eye. | ||||
| 4Cryptocrystalline (microscopically small crystals) includes agate, | ||||
| carnelian, chalcedony, chrysoprase, fossilized wood, heliotrope, | ||||
| jasper, moss agate, onyx, and sard. | ||||
Source: United States Geological Survey Mineral Resources Program