Gems. Gemstone: A precious or semi-precious stone. - usually a mineral Gem: A cut or polished gemstone. To be a gem a mineral must be: Rare beautiful.

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Presentation transcript:

Gems

Gemstone: A precious or semi-precious stone. - usually a mineral Gem: A cut or polished gemstone. To be a gem a mineral must be: Rare beautiful Hard (> 7) Quality cut or polish

The person who cuts and polishes gems is called a lapidary.

Marcel Tolkowsky Creator of the Brilliant Cut

Gabi Tolkowsky

There are two basic cutting styles: 1.Cabochon 2.Faceted Cabochon: rounded surfaces Faceted: flat surfaces organized in a pattern

Cabochon Black star diopsid Amethyst Emerald

Faceted Emerald Cut Amethyst Emerald Aquamarine

Faceted Brilliant Cut Amethyst TourmalineRuby

Faceted Oval Cut, Square Cut, Heart Cut Sapphire Aquamarine Citrine

Faceted

Diamond pure carbon April birthstone (along with Crystal Quartz)

Emerald Beryl May birthstone (along with Chrysoprase)

Ruby CorundumJuly birthstone (along with Carnelion)

Sapphire Corundum September birthstone (along with Lapis)

Aquamarine Beryl March birthstone (along with Bloodstone)

Opal Quartz October birthstone (along with Tourmaline)

Tourmaline October birthstone (along with Opal)

Garnet January birthstone (along with Rose Quartz)

Topaz November birthstone (along with Citrine)

Citrine Quartz November birthstone (along with Topaz)

Other Gemstones Apatite Gold Beryl Smokey Quartz Sunstone

Birthstones January: Garnet or Rose Quartz February: Amethyst or Onyx March: Aquamarine or Bloodstone April: Diamond or Rock Crystal May: Emerald or Chrysoprase June: Alexandrite or Moonstone July: Ruby or Carnelian August: Peridot or Sardonyx September: Sapphire or Lapis October: Opal or Tourmaline November: Topaz or Citrine December: Zircon or Turquoise

Synthetic Gems

Cubic Zirconium

4 C’s: Clarity

4 C’s: Color

4 C’s: Cut

4 C’s: Carat

Tolkowsky’s Cut