Gemstones ABC
- A
  - Strawberry Quartz B
  - Actinolite quartz
  - Agate Group
    
    Agate
  - Ajoite (in Quartz)
  - Alexandrite
  - Amazonite
  - Amber
  - Amethyst
    
    Amethyst Quartz
  - Ametrine
  - Ammolite
  - Andalusite
  - Andean Opal
  - Angelite
  - Anyolite
  - Apache Tear
  - Apatite
  - Apophylite
  - Aquamarine
  - Aragonite
  - Astrophylite
  - Atlantisite
  - Auralite 23
  - Aventurine
  - Aventurine-Feldspar
  - Azurite
  - Azurmalachite
- B
  - Barite
  - Amber
  - Rock Crystal
  - Beryl Group
  - Bixbite
  - Blue Calcite
  - Blue Quartz
  - Blue Lace Agate
  - Blue Fluorite
  - Blue Storm Agate
  - Boji-stone
  - Tree Agate
  - Bornite
  - Botswana Agate
  - Boulder Opaal
  - Breccie
  - Bronzite
- C
- D - F
- G-H-I
- H - I
- J - K
  - Jadeiete
    
    Jade
    
    Jade, Green
  - Jasper Group
    
    Jaspis
  - Coral
  - Corundum
  - Copper
  - Crocoite
  - Kunzite
  - Quartz Group
  - Quartz + Inclusions
  - Kyanite
- L
- M
- N - O
  - Nuummite
  - Obsidiaan Group
    
    Obsidian
    
    Obsidian, Gold
    
    Obsidian, Rainbow
    
    Obsidian, Snowflake
  - Okenite
  - Olivine
  - Onyx
  - Orpiment
  - Orthoceras
  - Orthoclase
  - Orange Calcite
  - Opal Group
    
    Opal
    
    Opal, Fire
- P - Q
- R
- S
- T - U
- V - Z
- Other Gemstones
Gem Colors
- White
  - Colorless
- Magenta
- Lila, Violet
- Indigo
- Royal Blue
- Blue
- Turquoise
- Green
  - Licht Groen
- Olive
- Yellow
- Gold
- Peach
- Orange
- Rose
- Red
- Brown
- Gray
- Black
- Multi-colored Gemstones
  - Regenboog
Jewelry

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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