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| Amethyst | ||
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| 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 | ||
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| 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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| Services SINGLE STONES PAIRS SETS CABOCHONS COLLECTOR'S DESIGNER'S |
| Site map WELCOME ORDER TERMS MINERALS RESERVE CONTACT US ABOUT US |
| Usually ships within 24 hours SEARCH FORM HELP INFO. FR TRACK ORDERS |
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| PHENAKITE NATURAL COLOR Hardness 7.5 |
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15.69
cts.
Phenakite emerald cut single
14.1x 13.5 mm. Eye clean. Enhancement: none (N) |
stone PRICE
SOLD ORIGIN: Madagascar
ref: PHwe 1569 |
Enlarge |
11.77
cts.
Phenakite oval single
20.5 x 10.9 mm. Depth: 7.4 mm. Eye clean. Enhancement: none (N) |
stone PRICE
USD 1270.00 ORIGIN: Madagascar
ref: PHwo 1177 |
Enlarge
|
8.15
cts.
Phenakite oval single
15.4 x 10.8 mm. Depth: 7.1 mm. Eye clean. Enhancement: none (N) |
stone PRICE
SOLD ORIGIN: Madagascar
ref: PHwo 815 |
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4.38
cts. Phenakite oval
single
11.9 x 9.4 mm. Eye clean. Enhancement: none (N) |
stone PRICE
SOLD ORIGIN: Madagascar
ref:PHo438
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0.53
cts.
Phenakite oval single
5.5 x 4.8 mm. ( sugf cut ) Eye clean. Enhancement: none (N) |
stone PRICE
SOLD ORIGIN: Madagascar
ref: PHwo053 |
To purchase a stone from this site click to ORDER Phenakite crystal
General Information |
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| Chemical Formula: | Be2SiO4 | |||
| Composition: | Molecular Weight = 110.11 gm | |||
| Berylium16.37 % Be 45.43 % BeO | ||||
| Silicon 25.51 % Si 54.57 % SiO2 | ||||
| Oxygen 58.12 % O | ||||
| ______ ______ | ||||
| 100.00 % 100.00 % = TOTAL OxIDE | ||||
| Empirical Formula: | Be2(SiO4) | |||
| Environment: | Alpine fissures, pegmatites, and hydrothermally altered rocks. | |||
| Locality: | Habachtal, Austria. Madagascar | |||
| Name Origin: | From the Greek phenakos - "liar." | |||
Phenakite Image |
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| Prismatic, bi-terminated crystal of Phenakite |
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Click on the picture to go to
Phenakite crystal.
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| © Image by A. Darbellay | ||||
Crystallography |
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| Axial Ratios: | a:c = 1:0.66164 | |||
| Cell Dimensions: | a = 12.472, c = 8.252, Z = 18; V = 1,111.63 Den(Calc)= 2.96 | |||
| Crystal System: | Trigonal-Rhomboedal H-M Symbol ( -3) Space Group: R3- | |||
| x Ray Diffraction: | By Intensity(I/Io): 3.119(1)3.66(0.8)2.518(0.75) | |||
| Forms: |
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Physical Properties |
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| Cleavage: | [1120] Distinct | |||
| Color: | colorless, wine yellow, yellow, pink, or pinkish red. | |||
| Density: | 2.97 - 3, Average = 2.98 | |||
| Diaphaniety: | Transparent to subtranslucent | |||
| Fracture: | Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments. | |||
| Habits: | Massive - Fibrous - Distinctly fibrous fine-grained forms., Granular - Generally occurs as anhedral to subhedral crystals in matrix., | |||
| Hardness: | 7.5-8 | |||
| Luminescence: | Non-fluorescent. | |||
| Luster: | Vitreous (Glassy) | |||
| Streak: | white | |||
Optical Properties |
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| Optical Data: | Uniaxial (+), w=1.654, e=1.67, bire=0.0160. | |||
Classification |
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| Dana Class: | Nesosilicate Insular SiO4 Groups Only | |||
| with cations in [4] coordination | ||||
| Phenakite group | ||||
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| Strunz Class: | Silicates | |||
| Nesosilicates, with [SiO4]4- groups, cations of tetrahedric orientation [4] | ||||
| STRUNZ - Silicates [Nesosilicates, with [SiO4]4- groups, cations of tetrahedric orientation [4] {Phenakite series}] | ||||
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