Identifying Valuble Stones

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- The harder a mineral is, the more likely it is to be valuable. If you can scratch the mineral with your fingernail, it has a hardness of 2.5 Mohs, which is very soft. If you can scratch it with a penny, its hardness is 3 Mohs, and if it takes a piece of glto scratch it, the hardness is 5.5 Mohs. Any stone that . - The mineralogy of opal allows it to diffract light, causing it to shimmer various colors. Poudretteite - $3,000 per carat. Benitoite - $4,000 per carat. Musgravite - $6,000 per carat. Red Beryl - $10,000 per carat. Alexandrite - $12,000 per carat. Diamond - $15,000 per carat. Serendibite - $18,000 per carat..Learn how to identify gemstones with JTV 's gemstone identification guide. Gemstone identification is great to understand, especially when you just bought a parcel of gemstones!.Ph.D. antiques appraiser Dr. Lori reveals how you can tell a more valuable gemstone simply by at the .

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