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TAVIRA
GEMS
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Gemstones
Precious
Semi-Precious
Rare & Collector
Organic
All Gemstones
Decorative Stones
Marble
Granite
Onyx
Quartzite
Limestone & Travertine
Semi-Precious Slabs
All Decorative Stones
Crystals & Minerals
Carving & Ornamental
Crystals & Specimens
Unique & Unusual
All Crystals & Minerals
Learn
Compare
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A–Z Index
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A–Z Index
The stone encyclopedia
Every gemstone, decorative stone and mineral on Tavira Gems, from A to Z.
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
All
Gemstones
Decorative Stones
Crystals & Minerals
A
Rare & Collector
Alexandrite
Chrysoberyl · Hardness 8.5
Extremely Rare
C
Marble
Calacatta Marble
Metamorphic · Carrara, Tuscany, Italy
Rare
Marble
Carrara Marble
Metamorphic · Carrara, Tuscany, Italy
Common
Semi-Precious
Citrine
Quartz · Hardness 7
Common
D
Precious
Diamond
Diamond (carbon) · Hardness 10
Uncommon
E
Precious
Emerald
Beryl · Hardness 7.5–8
Rare
O
Semi-Precious
Opal
Opal (hydrated silica) · Hardness 5.5–6.5
Uncommon
P
Organic
Pearl
Aragonite and conchiolin (nacre) · Hardness 2.5–4.5
Uncommon
R
Precious
Ruby
Corundum · Hardness 9
Rare
S
Precious
Sapphire
Corundum · Hardness 9
Rare
T
Semi-Precious
Tanzanite
Zoisite · Hardness 6–7
Rare
Semi-Precious
Topaz
Topaz · Hardness 8
Common