Stone-Gems Therapy

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Suggestions for Cleaning the Frequent Gem Varieties   How To Care Your Jewelry   How To Take care of Pearl

Agate    Amazonite   Amber   Ruby Zoisite   Apatite   Aquamarine   Aventurine   Obsidian   Onyx   Opal   Jasper   Tiger Eye   Topaz   Snowflake Obsidian   Cactus Quartz   Cape Amethyst   Carnelian   Charoite   Chryosprase   Chrysocolla   Citrine   Quartz   Coral   Diamond   Diopside   Dumortierite   Tourmaline   Emerald   Fluorite   Garnet   Hessonite   herapeutic Quartz   Howlite   Rhodocrosite   Iolite   Zircon   Jade   Jet  Kunzite   Kyanite  Labradorite   Sugilite   Sunstone   Tanzanite   Tree Agate   Turquoise   Unikite   Zebra Jasper   Zoisite   Healing Smoky Quartz   Lapis Lazuli   Lepidolite   Sillimanite   Sodalite   Lodestone   Malachite   Snow Quartz   Moonstone   Serpentine   Pearl   Pearl   Rose Quartz    Ruby   Rutile Quartz   Sapphire   Sardonyx

Carat

Unit of weight for diamonds and certain different valuable gems. Before 1913 the load of a carat various in different gem centres. Initially primarily based on the weight of grains or leguminous seeds, which, of course, various in measurement from place to place, the carat was equivalent to 0.2053 gram (3.168 troy grains) in London, 0.1972 g in Florence, and 0.2057 g in Amsterdam. The weight of a gemstone was calculated in terms of complete carats plus fractions (half of, 1/four, 1/eight, 1/sixteen, 1/32, or 1/sixty four) of a carat; thus, a stone may be stated to weigh 3 + 1/four + 1/16 carats. After numerous unsuccessful makes an attempt to standardize the carat, the metric carat, equal to 0.200 g, and the purpose, equal to 0.01 carat, were adopted by the United States in 1913 and subsequently by most different countries. The weights of diamond, ruby, sapphire, emerald, topaz, aquamarine, garnet, tourmaline, zircon, spinel, and sometimes opal and pearl are expressed in carats.