How to ascertain the identity of common coloured gemstones Presidium Instruments 4:56 3 years ago 16 131 Далее Скачать
That's how you'll find RUBIES and SAPPHIRES - #crystals #gems Cabo Da Nau 9:27 8 months ago 1 770 124 Далее Скачать
How to check Ruby Stone Real or Fake with Flashlight Balaji Gems Bhopal 0:36 5 years ago 805 993 Далее Скачать
How To Identify a Gemstone using a refractometer DF HOMSY DIAMONDS 2:46 2 years ago 29 927 Далее Скачать
How To Spot A Sapphire - Identify Gems Quick & Easily! Gemstones 6:56 1 year ago 194 973 Далее Скачать
Top 7 most valuable Colored Gemstones (excluding any diamonds) The Gem Guy 0:07 2 days ago 595 Далее Скачать
Gemstone Identification at Home | How to Identify Gemstones in Jewelry | Gems & Stones Texas Gal Treasures 9:31 4 years ago 114 010 Далее Скачать
How To ID Gemstones | Specific Gravity, Density & More! Gemstones 17:44 2 years ago 69 542 Далее Скачать
How to identify 9 minerals in ONE MINUTE using sandpaper, nail, and magnet Soil Mechanics and Engineering Geology 2:01 3 years ago 48 266 Далее Скачать