referat.am kursayinner referatner diplomayinner tezer պատվիրել աշխատանքներ description_1

1. Alden, Nancy. Simply Gemstones: Designs for Creating Beaded Gemstone Jewelry , 2009.
2. Wise, R. W., Secrets Of The Gem Trade, The Connoisseur's Guide To Precious Gemstones, Brunswick House Pr, 2006
3. Burnham, S.M. Precious Stones in Nature, Art and Literature. Bradlee Whidden, 1868.
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