PHENAKITE                                 NATURAL COLOR                  Hardness 7.5
Next page  »»   Phenakite cluster   Faceted Phenakite
 10.98 cts. Bi terminated Phenakite crystal single

  12.8  x  11.1  mm. (Translucent) (Glossy)

  Enhancement: none (N) 

stone PRICE  

USD 96.00 

ORIGIN: Madagascar

ref: PHCw1098c 

 

 14.18 cts. Bi terminated  Phenakite crystal single

  14.5  x  12.4  mm. (Translucent) (Glossy)

  Enhancement: none (N) 

stone PRICE  

USD 130.00 

ORIGIN: Madagascar

ref: PHCw1418c 

 

Enlarge  16.96 cts. Phenakite crystal cluster on tourmaline shorl

25.5 x 15.2 mm. Size of individual crystal: 10.1 x 6 mm 

(Translucent) (Glossy) Enhancement: none (N)

stone PRICE  

 SOLD 

ORIGIN: Madagascar

ref: PHCw1696 

 

Enlarge  40.76 cts. Phenakite crystal cluster

  25.3 x 21.7 mm. Size of individual crystal: 10 x 7.1 mm 

(Translucent) (Glossy) Enhancement: none (N)

stone PRICE  

USD 150.00 

ORIGIN: Madagascar

ref: PHCw4076 

 

9.76 cts. Bi terminated  Phenakite crystal single

  13  x  11.1  mm.  (Translucent) (Glossy)

Enhancement: none (N)

stone PRICE  

USD 97.00 

ORIGIN: Madagascar

ref: PHCw976 

 

Enlarge  30 grms. Phenakite crystal cluster  single 

 42.7 x 35 x 27.7 mm. Size of individual crystal: 13.4 x 6 mm  ( Translucent ) 

( Bi terminated )  Enhancement: none (N)

stone PRICE  

USD 160.00 

ORIGIN: Madagascar

ref: PHCw30gr 

 

 56 grs. Phenakite crystal on shorl  single 

  52.7 x 41.3 mm. Size of individual crystal: 7.3 x 3.7 mm ( Translucent ) 

( Bi terminated )  Enhancement: none (N) 

stone PRICE  

USD 115.00 

ORIGIN: Madagascar

ref: PHCTw56g 

 

 82.24 cts. Phenakite crystal on shorl  single 

 38 x 24 mm. Size of individual crystal: 9.3 x 4 mm ( Translucent ) 

( Bi terminated )  Enhancement: none (N)

stone PRICE  

USD 99.00 

ORIGIN: Madagascar

ref: PHCw8224c 

 

 32.90 cts. Phenakite crystal cluster  single 

  24.5 x 24.8 mm. Size of individual crystal: 16 x 9.2 mm

( Bi terminated )  Enhancement: none (N) 

stone PRICE  

 SOLD 

ORIGIN: Madagascar

ref: PHCw3290c 

 

 6 grms. Bi terminated  Phenakite crystal  single 

21.2 x 16.1 mm. Size of individual crystals:16.6 mm

  Enhancement: none (N)

Enlarge

stone PRICE  

 SOLD 

ORIGIN: Madagascar

ref: PHCw6g 

 

 20.91 cts. Phenakite crystal cluster  single 

 22 x 18.6 mm. Size of individual crystal: 9.6 x 5.9 mm ( Translucent )

 Enhancement: none (N) 

 

stone PRICE  

 SOLD 

ORIGIN: Madagascar

ref: PHCw2091c 

 

 39.81 cts. Phenakite crystal cluster on shorl  single 

 27 x 24.6 mm. Size of individual crystal: 5 x 4.6 mm ( Translucent ) 

 Enhancement: none (N) 

stone PRICE  

 SOLD 

ORIGIN: Madagascar

ref: PHCw3981c 

 

 11.62 cts. Bi terminated  Phenakite crystal single

  13.1  x  11  mm. (Translucent) (Glossy)

  Enhancement: none (N) 

stone PRICE  

 SOLD 

ORIGIN: Madagascar

ref: PHCw1162c 

 

 63.33 cts. Phenakite crystal cluster on shorl  single 

 33 x 19.4 mm. Size of individual crystal: 7 x 3 mm ( Translucent ) 

( Bi terminated )  Enhancement: none (N) 

stone PRICE  

 SOLD 

ORIGIN: Madagascar

ref: PHCw6333c 

 

Enlarge  25.13 cts. Phenakite crystal cluster

24.1 x 17.2 mm. Size of individual crystal: 10 x 8.5 mm 

(Translucent) (Glossy) Enhancement: none (N)

stone PRICE  

 SOLD 

ORIGIN: Madagascar

ref: PHCw2513 

 

Enlarge  27.38 cts. Phenakite crystal cluster

28.7 x 20.2 mm. Size of individual crystal: 10.8 x 6 mm 

(Translucent) (Glossy) Enhancement: none (N)

stone PRICE  

 SOLD 

ORIGIN: Madagascar

ref: PHCw2738 

   

15.20 cts. Bi terminated  Phenakite crystal single 

  14.2  x  12.4  mm. (Translucent) (Glossy)

Enhancement: none (N)

stone PRICE  

 SOLD 

ORIGIN: Madagascar

ref: PHCw1520 

 

 40.59 cts. Phenakite crystal cluster  single 

 26.2 x 22  mm. Size of individual crystal: 12.6 x 7 mm ( Translucent ) 

( Bi terminated )  Enhancement: none (N) 

stone PRICE  

 SOLD 

ORIGIN: Madagascar

ref: PHCw4059c 

 

 7.73 cts. Phenakite crystal cluster  single 

  12.8 x 12.8 mm. Size of individual crystal: 12.4 x 6.2 mm ( Translucent ) 

( Bi terminated )  Enhancement: none (N) 

stone PRICE  

 SOLD 

ORIGIN: Madagascar

ref: PHCw773c 

Next page  »»   Phenakite cluster   Faceted Phenakite

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General Information

 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

Prismatic, bi- terminated crystals of Phenakite

 

 

Click on the picture to go to facet Phenakite.
  © Image by A. Darbellay 

Crystallography

 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)
   
 

Physical Properties

 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

 Optical Data: Uniaxial (+), w=1.654, e=1.67, bire=0.0160.
 

Classification

 Dana Class: Nesosilicate Insular SiO4 Groups Only
  with cations in [4] coordination
  Phenakite group
 
 Phenakite Be2SiO4 R3- -3
 
 Willemite Zn2SiO4 R3- -3
 
 Eucryptite LiAlSiO4 R3- -3
 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}]
 
Phenakite Be2SiO4 R3- -3
 
 Willemite Zn2SiO4 R3- -3
 
 Eucryptite LiAlSiO4 R3-
 
 
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  Green Verdict Image
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