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30 Cards in this Set
- Front
- Back
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GROUP
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TWO OR MORE CHEMICALLY RELATED GEM MINERAL SPECIES THAT ARE SIMILAR IN STRUCTURE AND PROPERTIES
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IRRIDESCENCE
ORIENT ADULARESCENCE CHANGE-OF-COLOR |
-Prismatic--Fire agate
-Prismatic sheen-Pearl, shell, Mother of pearl -Floating interior light-moonstone -selective absorption of light-Chrysoberyl,Alex |
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HABIT
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THE CRYSTAL FORM WHICH A MINERAL MOST OFTEN OCCURS
EG. HABIT OF DIAMOND IS OCTOHEDRON |
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ORGANIC GEMS
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PEARL
CORAL JETT AMBER MOTHER-OF-PEARL |
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CAMEO
ITALIO |
ABOVE THE GIRDLE
BELOW THE GIRDLE |
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PHENOMENONS-
CHATOYANCY ASTERISM PLAY-OF-COLOR LABRADORESCENCE |
9 TYPES-
-quartz tigers eye, chrysoberyl cat's eye -star ruby star sapphire -glittery efect-quartz, adventurine, sunstone -OPAL -Broad flash of color-Labradorite (feldspar) |
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AGATES
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CHALCEDONY+
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ACHROMATIC
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COLORS PERCEIVED TO HAVE NO HUE(COLOR)
EG. GRAYS, BLACK, WHITE |
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SYNTHETIC
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HAS ESSENTIALLY THE SAME OPTICAL, CHEMICAL, AND PHYSICAL PROPERTIES OF IT'S NATURAL COUNTERPART
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CRYSTAL SYSTEMS
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ISOMETRIC (CUBIC)
HEXAGONAL TETRAGONAL ORTHRHOMBIC MONOCLINIC TRICLINIC |
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IDIOCHROMATIC
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GEM COLORED BY AN ESSENTIAL COMPNENT
EG. IRON IN PERIDOT |
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FLOURESCENCE
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EMISSION OF VISIBLE LIGHT BY UV OR X-RAY
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ISOMORPH
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SUBSTITUTION OF METAL IONS IN A CRYSTAL STRUCTURE
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AMORPHOUS
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WITHOUT FORM...NO CRYSTAL STRUCTURE
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ANISOTROPIC
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POSEESING THE PROPERTY OF DOUBLE REFRACTION
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SPECIES
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MINERALS W/ DEFINITE CHEMICAL COMPOSITION AND USUALLY CHARACTERISTIC CRYSTAL STRUCTURE
EG. CORUNDUM, BERYL |
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BIREFRINGENCE
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STRENGTH OF DOUBLE REFRACTION BY TAKING THE DIFFERENCE OF THE HI & LO INDICES OF A DOUBLY REFRACTIVE STONE
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VARIETY
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SUBDIVISIONS OF SPECIES
EG. SPECIES-CORUNDUM VARIETY-RUBY, SAPPHIRE |
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ADAMAS
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INDESTRUCTIBLE
UNCONQUERABLE INVINCIBLE |
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POLYMORPH
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SAME CHEMICAL BUT A DIFFERENT CRYSTAL
EG. DIAMOND OR GRAPHITE both carbon |
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MOH'S SCALE OF HARDNESS
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TALC ORTHOCLASE
GYPSUM QUARTZ CALCITE TOPAZ FLOURITE CORUNDUM APATITE DIAMOND |
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DICHROSCOPE
DICHROISM |
INSTRUMENT USED TO DETECT PLEOCHROISM
PRODUCING TWO COLORS WHEN OBSERVED THROUGH A DICHROSCOPE |
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PSEUDOMORPH
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FALSE FORM
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IRIDESCENCE
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LIGHT INTERFERENCE EFFECT IN THIN FILMS OF GAS OR LIQUID CAUSING RAINBOW EFFECTS
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GARNETS
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PYROPE-RHODALITE
ALMANDITE SPESSARTITE-MALAIA(COLOR CHG) GROSSULARITE-HESSONITE, TSAVORTITE ADRADITE-DEMANTOID,MELANITE UVAROITE ALL COLORS..EX. BLUE ISOMETRIC |
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CHRYSOBERYL
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ALEXANDRITE-COLOR CHANGE
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ALLOCHROMATIC
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GEM THAT DERIVE THEIR COLOR FROM AN ESSENTIAL IMPURITY...
EG. RUBY OR EMERALD |
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MINERAL CRYSTAL SYSTEMS
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ISOMETRIC
HESAGONAL TETRAGONAL ORTHORHOMBIC MONOCLINIC TRICLINIC |
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PLEOCHROISM
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UNEQUAL ABSORPTION OF THE TWO PORTIONS OF A DOUBLY REFRACTED BEAM OF LIGHT, PRODUCING TWO OR MORE COLORS THROUGH A DICHROSCOPE
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PERIDOT (OLIVINE)
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EVENING EMERALD
YELLOW-GREEN-->GREENISH-YELLOW |
