|
| TABLE 2- | ||||||
| LABORATORY-CREATED GEMSTONE PRODUCTION METHODS | ||||||
| Gemstone | Production method | Company/producer | Date of first production | |||
| Alexandrite | Flux | Creative Crystals Inc. | 1970s. | |||
| Do. | Melt pulling | J.O. Crystal Co., Inc. | 1990s. | |||
| Do. | do. | Kyocera Corp. | 1980s. | |||
| Do. | Zone melt | Seiko Corp. | Do. | |||
| Cubic zirconia | Skull melt | Various producers | 1970s. | |||
| Emerald | Flux | Chatham Created Gems, Inc. | 1930s. | |||
| Do. | do. | Gilson | 1960s. | |||
| Do. | do. | Kyocera Corp. | 1970s. | |||
| Do. | do. | Lennix | 1980s. | |||
| Do. | do. | Russia | Do. | |||
| Do. | do. | Seiko Corp. | Do. | |||
| Do. | Hydrothermal | Biron Corp. | Do. | |||
| Do. | do. | Lechleitner | 1960s. | |||
| Do. | do. | Regency | 1980s. | |||
| Do. | do. | Russia | Do. | |||
| Ruby | Flux | Chatham Created Gems, Inc. | 1950s. | |||
| Do. | do. | Douras | 1990s. | |||
| Do. | do. | J.O. Crystal Co., Inc. | 1980s. | |||
| Do. | do. | Kashan Created Ruby | 1960s. | |||
| Do. | Melt pulling | Kyocera Corp. | 1970s. | |||
| Do. | Verneuil | Various producers | 1900s. | |||
| Do. | Zone melt | Seiko Corp. | 1980s. | |||
| Sapphire | Flux | Chatham Created Gems, Inc. | 1970s. | |||
| Do. | Melt pulling | Kyocera Corp. | 1980s. | |||
| Do. | Verneuil | Various producers | 1900s. | |||
| Do. | Zone melt | Seiko Corp. | 1980s. | |||
| Star ruby | Melt pulling | Kyocera Corp. | Do. | |||
| Do. | do. | Nakazumi Earth Crystals Co. | Do. | |||
| Do. | Verneuil | Linde Air Products Co. | 1940s. | |||
| Star sapphire | do. | do. | Do. | |||
| Do., do. Ditto. | ||||||
Source: United States Geological Survey Mineral Resources Program
See also: Mineral commodity prices
