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Gemstones ABC
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A
- Strawberry Quartz B
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C
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P - Q
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S
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- T - U
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V - Z
- Hawk's eye
- Vanadinite
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- Feldspar Group
- Verdelite, green Tourmaline
- Petrified Wood
- Petrified Coral (Petoskey Stone)
- Vesuvianite
- Fire Opal
- Watermelon Tourmaline
- Wavellite
- White Quartz
- White Selenite
- White spodumene
- Desert Rose
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- Zincite
- Zircon
- Zoisite Group
- Aventurine-Feldspar
- Black tourmaline
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A
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Jewelry
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Rings
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Ringsizes
- 3.5 / G
- 4 / H
- 4.5 / J
- 5 / J 1/2
- 5.5 / L
- 5 ¾ / L ½
- 6 / M
- 6.5 / N
- 7 / O
- 7.5 / O ½
- 7.5 / P
- 8 / Q
- 8.5 / Q-Q1/2
- 9 / R 1/2 - S 1/2
- 9 ¼ / S ½
- 9.5 / S 1/2 - T
- 10 / T½
- 10-10.5 / T 1/2 - V
- 10.5 / V
- 11 / V 1/2 - W
- 11 / W
- 12
- 12 / Y
- 12.5 - 13 / Y 1/2 - Z+1
- 13.5 / Z+1 - Z+2
- 13 3/4 - 14 / Z+21/2 - Z+3
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Asterism (star-effect)
Asterism, or star, is a rare lighteffect in natural precious stones.
Starlike rays of light observed in some minerals when viewed from certain directions, particularly if the mineral is cut en cabochon. Minerals having this feature are called asteriated or star. Asteriated beryl, chrysoberyl, crocidolite, emerald, quartz, ruby, and sapphire are known.
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