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Categories
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Celebrations
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Exquisite Stones
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Gemstones ABC
- A
- B
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C
- Cacoxenite (Super 7)
- Calcite
- Calcite Group
- Calcite, Blue
- Calcite, Mangano
- Calcite, Orange
- Carnelian
- Cavansite
- Celestite
- Chalcedony
- Chalcedony Group
- ChalcoPyrite
- Charoite
- Chiastolite
- Chlorite in Quartz
- Chrysanthemum Stone
- Chrysoberyl
- Chrysocolla
- Chrysolite
- Chrysoprase
- Citrine
- Citron
- Clinochlor
- Corderite
- D-E-F
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G-H-I
- Gabbro
- Galena
- Calcite Orange
- Yellow Fluorite
- Gypsum Group
- Jet
- Gold ore
- Goldsheen Obsidian
- Golden Topaz
- Garnet
- Grenade Group
- Green Garnet
- Garnet, Red
- Fluorite Green
- Green Jade
- Green Tourmaline
- Grossular
- Bloodstone / Heliotrope
- Hematite
- Hematoid Quartz
- Hemimorphite
- Herkimer Diamond
- Hiddenite
- Hypersthene
- Iolite
- J - K - L
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M N O
- Moonstone
- Moonstone, Peache
- Moonstone, Rainbow
- Magnesite
- Magnetite
- Malachite
- Snow Quartz
- Dendritic Chalcedony
- Mangano Calcite
- Meteorite
- Mica Group
- Moldavite
- Mookaite
- Moqui marbles,
- Morganite
- Moss Agate
- Muscovite
- Nuummite
- Obsidian
- Obsidiaan Group
- Obsidian, Gold
- Obsidian, Rainbow
- Obsidian, Snowflake
- Okenite
- Olivine
- Onyx
- Orpiment
- Orthoceras
- Orthoclase
- Orange Calcite
- Opal
- Opal Group
- Opal, Fire
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P Q R
- Purple Florite
- Pearl & Mother of Pearl
- Peridot
- Petalite
- Moonstone, Peache
- Pietersite
- Prehnite
- Pyrite
- Pyroop
- Proxene
- Pyroxene Group
- Quantum Quattro
- Regenboog Fluoriet
- Moonstone
- Rainbow Obsidian
- Rhodochrosite
- Rhodonite
- Rhyolite
- Ruby
- Anyolite
- Red Agate
- Pyrope - Reg Garnet
- Red Jasper
- Smoky Quartz
- Rose Quartz
- Rubellite
- Rutilated Quartz
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S T U
- Sapphire
- Schörl
- Foam Coral
- Selenite
- Selenite, White
- Septarian
- Seraphinite
- Serpentine (New Jade)
- Sphalerite
- Shungite
- Snow quartz
- Emerald
- Snowflake Obsidian
- Sodalite
- Spinel
- Spectrolite
- Spodumene
- Spodumene, White
- Staurolite Fairy Cross
- Star Rose Quartz
- Stibnite
- Stichtite
- Sugilite
- Super 7
- Strawberry Quartz
- Stromatolite
- Tanzanite
- Tectite
- Thulite
- Tourmalinated Quartz
- Tourmaline, Watermelon
- Tourmaline, Black
- Tourmaline Group
- Tiger-iron
- Tourmaline
- Tigereye
- Topaz
- Topaz Group
- Trilobites
- Turquoise
- Ulexite
- Unakite
- V W X
- Y Z
- OTHER VARIETIES
- Shapes & Cuts
- Tumbled Stones
- Chatoyancy
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Gemstones ABC
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People
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.