12.5 - 13 / Y 1/2

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

12.5 - 13 / Y 1/2 - Z+1

mm:	NL:	EU:	SWISS:	UK:	USA:	JAPAN:
21.8		68	28-28 ¾	Y ½-Z	12.5	26-27
22.0	22	68.5	28-28 ¾	Z	12.5	28
22.2		69-70	29 ¼-30	Z ½-Z+1	13	29

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