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What are Crystal Systems and Mineral Habits? Crystals have habits. In crystallography, mineral habits refer to the way crystals form within a specific mineral. There are six crystal systems. Scrubber Ads | Gumtree Classifieds South Africa Find scrubber Postings in South Africa! Search Gumtree Free Classified Ads for the latest scrubber listings and more. A Guide to Gem Classifiion About the author Donald Clark, CSM IMG Donald Clark, CSM founded the International Gem Society in 1998. Donald started in the gem and jewelry industry in 1976.    Read More

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