Glossary of GEMOLOGY-GEMSTONE
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Learn about CORUNDUM
HEAT ENHANCED , ORTHOCLASE FELDSPAR SPECIES
H. 6
MONOCLINIC , K(POTASSIUM)-FELDSPARS , MALACHITE , CHRYSOBERYL
3 rare varieties , OGLIOCLASE FELDSPAR SPECIES , MOONSTONE
-ORTHOCLASE FELDSPAR , ANDALUSITE , LAPIS LAZULI
DYED A MORE EVEN BLUE , FELDSPAR(PLAGIOCLASE)
ADVENTURINE
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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
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