GemstonesSite Listings:- Online Gemstones Publications - As searched from the InfoMine Publications database
- An Overview of Production of Specific U.S. Gemstones - (USGS) U.S. Bureau of Mines Special Publication 14-95
- Australian Gemstones - (Australian Museum Online) Descriptions and occurrences of diamond, opal, sapphire, ruby, emerald, topaz, quartz, garnet, zircon and other gemstones
- Electronic Gemstone Library - (Canadian Institute of Gemmology) Descriptions and pictures of popular gemstones
- Gemstone News - (MiningNews.net) News stories about gemstone mining
- Gemstones Statistics and Information - (USGS)
- Sapphire - (Queensland Department of Mines and Energy) Occurrences, mining, production and outlook
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