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Glossary of GEMOLOGY-GEMSTONE

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CORUNDUM
HEAT ENHANCED
RUBY
SAPPHIRE
ORTHOCLASE FELDSPAR SPECIES
H. 6
MONOCLINIC
VARIETIES----
MOONSTONE(W/ OPALESCENCE)
ADVENTURINE(HEMATITE)
K(POTASSIUM)-FELDSPARS
SPECIES-----
MICROCLINE
SANIDINE
ORTHOCLASE(most important is Moonstone)
MALACHITE
BRIGHT GREEN
MONOCLINIC
CHRYSOBERYL

3 rare varieties
PHENOMENAL V.
CAT'S EYE-chatoyant
ALEXANDRITE-color change
"AND" CAT'S-EYE ALEXANDRITE-both
OGLIOCLASE FELDSPAR SPECIES
SUNSTONE
MOONSTONE
MOONSTONE
-ORTHOCLASE FELDSPAR
Ehibits "adularescence" and "chatoyancy" cat's eye
ANDALUSITE
EXHIBITS PLEOCHROISM
LAPIS LAZULI
DYED A MORE EVEN BLUE
MIXTURE OF FELDSPARS AND IS A ROCK "NOT A MINERAL"
FELDSPAR(PLAGIOCLASE)

ADVENTURINE
50-60% OF EARTH'S CRUST
ALBITE
OLIGOCLASE
ANDESINE
LABRADORITE
BYTOWNITE
ANORTHITE
JADE
2 SPECIES
JADEITE (PYROXENE)
AND NEPHRITE (AMPHIBOLE)
S. SPESSARTITE
V.--MALAIA--COLOR CHANGE
(QUARTZ)CHALCEDONY
ALL COLORS
HEXAGONAL
Most color enhanced
Agate, Bloodstone (Heliotrope), Blue Mist Chalcedony, Carnelian, Chrysoprase, Holly Blue, Jasper, Onyx, Orange Chalcedony, Sardonyx, Tiger's eye, Sard, Flint,
S. GROSSULARITE
V.--Hessonite,
Tsavorite
Hydrogrossular--Hibschite and Katoite
GARNET-GROUP
ALL COLORS EX. BLUE
SPECIES---
Pyrope
Almandite
Spessartine
Grossularite
Andradite
Uvaroite
S. ALMANDITE
V.--Almandite
Never pure in nature
mix almandite/pyrope
shows asterism
S. PYROPE
V.--RHODALITE..
Has some color change properties
Some asterism 4 & 6 rayed
QUARTZ-COARSE OR GRANULAR
EXHIBIT CHATOYANCY, ASTERISM
AMETHYST-BLUE TO PURPLE
CITRINE-,AMETHYST/CITRINE-,SMOKY QUARTZ-,ROSE-,MILKY
CAT'S-EYE,TIGER'S EYE,AND "ADVENTURINE"
BERYL
CRYS-HEXAGONAL
H-7.5
EMERALD-GREEN trapiche
HELIODOR-GREENISH YELLOW
MORGANITE-PINK
GOSHENITE-COLORLESS RED BERYL(BIXBITE)
GOLDEN BERYL
GREEN BERYL-YELLOWISH GREEN
AQUAMARINE-BLUE "MAXIXE" unstable blue
S. UVAROITE
V.--DK. GREEN (CHROMIUM)
TOO SMALL FOR CUTTING
S. ANDRADITE
V. DEMANTOID-GREEN
TOPAZLITE
MELANITE (OPAQUE)
EXHIBITS CHATOYANCY AND IRIDESCENCE
V.Demantoid-Green
Topazlite

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