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G e n u i n e G e m s |
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| Amethyst | ||
| Apatite | ||
| Aquamari | ||
| Beryl | ||
| Citrine | ||
| Danburite | ||
| Emerald | ||
| Hessonite | ||
| Malaya | ||
| Rhodolite | ||
| Spessart. | ||
| Hambergi | ||
| Iolite | ||
| Orthoclas | ||
| Phenakit | ||
| Quartz | ||
| Ruby | ||
| Sapphire | ||
| Sa. Fancy | ||
| Sa. Pink | ||
| Sa. Padpar | ||
| Sphene | ||
| Topaz | ||
| Tourmalin | ||
| Bi-color | ||
| Chrome | ||
| Green | ||
| Peach | ||
| Pink | ||
| Rubellite | ||
| Yellow | ||
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| Aquamar | ||
| Amethyst | ||
| Emerald | ||
| Hessonite | ||
| Iolite | ||
| Labrador | ||
| Quartz | ||
| Quartz bl. | ||
| Rhodolite | ||
| Ruby | ||
| Spessart. | ||
| Sap.Slice | ||
| Cab. Sapp | ||
| Tourmalin | ||
| Cat's eye | ||
| Green | ||
| Pink | ||
| Peach | ||
| Polychro. | ||
| Rubellite | ||
| Slice | ||
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G e n u i n e G e m s |
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| ZIRCON NATURAL COLOR Hardness 7.5 |
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General Information |
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| Chemical Formula: | ZrSiO4
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| Composition: | Molecular Weight = 183.31 gm | ||
| Zirconium 49.77 % Zr 67.22 % ZrO2 | |||
| Silicon 15.32 % Si 32.78 % SiO2 | |||
| Oxygen 34.91 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: | ZrSiO4 | ||
| Environment: | Magmatic, metamorphic, pegmatitic, and alluvial rocks.. | ||
| Locality: | Australia, Sri-Lanka, Madagascar, Burma, Lao. | ||
| Name Origin: | Named from its containing the element, zirconium; which was named from the Arabic, zargun = "gold color." | ||
| Synonym: | Cyrtolite | ||
| Hyacinth - orange red | |||
| Jarcon - colorless | |||
| Malacon | |||
| Zircon Image | |||
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Crystallography |
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| Axial Ratios: | a:c = 1:0.90536 | ||
| Cell Dimensions: | a = 6.604, c = 5.979, Z = 4; V = 260.76 Den(Calc)= 4.67 | ||
| Crystal System: | Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: I41/amd | ||
| X Ray Diffraction: | By Intensity(I/Io): 3.3(1) 2.518(0.45) 4.43(0.45) | ||
| Forms:
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| Physical Properties | |||
| Cleavage: | [110] Indistinct | ||
| Color: | brown, reddish brown, colorless, gray, or green. | ||
| Density: | 4.6 - 4.7, Average = 4.65 | ||
| Diaphaniety: | Transparent to translucent to opaque | ||
| Fracture: | Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. | ||
| Habits: | Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Tabular - Form dimensions are thin in one direction., Crystalline - Fine - Occurs as well-formed fine sized crystal s. | ||
| Hardness: | 7.5 - Garnet | ||
| Luminescence: | Fluorescent and radioactive, Short UV=yellow, Long UV=dull red. | ||
| Luster: | Adamantine | ||
| Streak: | white | ||
| Optical Properties | |||
| Dichroism (e): | colorless. | ||
| Dichroism (w): | colorless. | ||
| Gladstone-Dale: | CI
meas= 0.011 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.016 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2067,KPDmeas= 0.2076,KC= 0.21 |
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| Optical Data: | Uniaxial (-), e=1.92-1.96, w=1.967-2.015, bire=0.0470-0.0550. | ||
| Classification | |||
| Dana Class: | 51.5.2.1 (51)Nesosilicate Insular SiO4 Groups Only | ||
| (51.5)with cations in >[6] coordination | |||
| (51.5.2)Zircon group | |||
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| Strunz Class: | A.09-10 - Silicates | ||
| Nesosilicates with [SiO4]4-groups, cations of octahedral and cubic orientation [8+6] | |||
| Zircon - Thorogummite series | |||
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