|
||
|
||
| G
u a r a n t e e d
G e n u i n e G e m s |
||
 |
||
| Facet | ||
|
||
| Amethyst | ||
| Apatite | ||
| Aquamari | ||
| Beryl | ||
| Citrine | ||
| Danburite | ||
| Emerald | ||
| Hessonite | ||
| Malaya | ||
| Rhodolite | ||
| Spessart. | ||
| Hambergi | ||
| Iolite | ||
| Orthoclas | ||
| Phenakit | ||
| Quartz | ||
| Ruby | ||
| Sapphire | ||
| Sa. Fancy | ||
| Sa. Pink | ||
| Sa.Sunset | ||
| Sphene | ||
| Topaz | ||
| Tourmalin | ||
| Bi-color | ||
| Chrome | ||
| Green | ||
| Peach | ||
| Pink | ||
| Rubellite | ||
| Yellow | ||
|
||
| Cab. | ||
|
||
| 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 | ||
|
|
G e n u i n e G e m s |
|
 |
||
 |
||
 |
 |
| 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 |
|
| ORTHOCLASE NATURAL COLOR Hardness 6 |
|
| Next pages »» ORTHOCLASE 2 ¦ ORTHOCLASE FACET ¦ | 
|
|
17.45 cts. yellow orthoclase crystal single
14.2 x 12 mm. This stone is transparent. Damage at the contact zone with its bed rock, but its shape is complete Top crystal. Enhancement: none (N) |
stone PRICE
USD 54.00 ORIGIN: Itrongay, Madagascar
ref:Oyr1745
|
|
22.59
cts. yellow orthoclase crystal single
16 x 16.4 mm. This stone is transparent. Damage at the contact zone with its bed rock. Top crystal. Enhancement: none (N) |
stone PRICE
USD 57.00 ORIGIN: Itrongay, Madagascar
ref:Oyr2259
|
 |
23.60 cts. yellow orthoclase crystal single
18.9 x 13.9 mm. This stone is transparent. Damage at the contact zone with its bed rock, but its shape is complete. Top crystal. Enhancement: none (N) |
stone PRICE
USD 65.00 ORIGIN: Itrongay, Madagascar
ref:Oyr2360
|
 |
32.82 cts. yellow orthoclase crystal single
23.5 x 18 mm. This stone is transparent. Damage at the contact zone with its bed rock, damage at corners. Top crystal. Enhancement: none (N) |
stone PRICE
USD 82.00 ORIGIN: Itrongay, Madagascar
ref:Oyr3282
|
Enlarge |
33.35
cts. yellow orthoclase crystal single
20.2 x 15.3 mm. This stone is transparent. Damage at the contact zone with its bed rock, cleavage on a face. Top crystal. Enhancement: none (N) |
stone PRICE
USD 96.00 ORIGIN: Itrongay, Madagascar
ref:Oyr3335
|
Enlarge |
37.50 cts. yellow orthoclase crystal single
22 x 18.7 x 9.1 mm. Top crystal. Enhancement: none (N) |
stone PRICE
USD 159.00 ORIGIN: Itrongay, Madagascar
ref:Oyr3750
|
Enlarge |
42.08
cts. yellow orthoclase crystal single
18.1 x 18.5 x 14.5 mm. Top crystal. Enhancement: none (N) |
stone PRICE
USD 124.00 ORIGIN: Itrongay, Madagascar
ref:Oyr4208
|
Enlarge |
44.52 cts. yellow orthoclase crystal single
23.4 x 19.1 x 11.4 mm. Top crystal. Enhancement: none (N) |
stone PRICE
USD 156.00 ORIGIN: Itrongay, Madagascar
ref:Oyr4452
|
Enlarge |
44.84 cts. yellow orthoclase crystal single
20 x 19.3 x 12.4 mm. Top crystal. Enhancement: none (N) |
stone PRICE
USD 178.00 ORIGIN: Itrongay, Madagascar
ref:Oyr4484
|
Enlarge |
66.08 cts. yellow orthoclase crystal single
26.9 x 21.8 x 17 mm. Top crystal. Enhancement: none (N) |
stone PRICE
USD 238.00 ORIGIN: Itrongay, Madagascar
ref:Oyr6608
|
Enlarge |
66.28 cts. yellow orthoclase crystal single
28.7 x 21.3 x 13.3 mm. Top crystal. Enhancement: none (N) |
stone PRICE
USD 248.00 ORIGIN: Itrongay, Madagascar
ref:Oyr6628
|
Enlarge |
67.84 cts. yellow orthoclase crystal single
29 x 21.7 x 11 mm. Top crystal. Enhancement: none (N) |
stone PRICE
USD 275.00 ORIGIN: Itrongay, Madagascar
ref:Oyr6784
|
Enlarge |
79.89
cts. yellow orthoclase crystal single
30.5 x 30.1 mm. Top crystal. Enhancement: none (N) |
stone PRICE
USD 280.00 ORIGIN: Itrongay, Madagascar
ref:Oyr7989
|
Enlarge |
79.74 cts. yellow orthoclase crystal single
29.2 x 22.7 x 17.4 mm. Top crystal. Enhancement: none (N) |
stone PRICE
USD 380.00 ORIGIN: Itrongay, Madagascar
ref:Oyr7974
|
Enlarge |
84.06 cts. yellow orthoclase crystal single
33.2 x 20 x 16.5 mm. Top crystal. Enhancement: none (N) |
stone PRICE
USD 380.00 ORIGIN: Itrongay, Madagascar
ref:Oyr8406
|
Enlarge |
84.85 cts. yellow orthoclase crystal single
20.7 x 22.8 x 17.5 mm. Top crystal. Enhancement: none (N) |
stone PRICE
USD 368.00 ORIGIN: Itrongay, Madagascar
ref:Oyr8485
|
Enlarge |
100.35 cts. yellow orthoclase crystal single
34.4 x 30.6 x 20.1 mm. Top crystal. Enhancement: none (N) |
stone PRICE
USD 445.00 ORIGIN: Itrongay, Madagascar
ref:Oyr10035
|
Enlarge |
102.92 cts. yellow orthoclase crystal single
41.1 x 24 x 15.7 mm. Top crystal. Enhancement: none (N) |
stone PRICE
USD 515.00 ORIGIN: Itrongay, Madagascar
ref:Oyr10292
|
Enlarge |
24
grms. yellow orthoclase crystal single
39 x 21 x 16 mm. Top crystal. Enhancement: none (N) |
stone PRICE
USD 690.00 ORIGIN: Itrongay, Madagascar
ref:Oyr24g
|
Enlarge |
113.5
grms. yellow orthoclase crystal single
77.7 x 35.3 mm. Top crystal. Enhancement: none (N) |
stone PRICE
SOLD ORIGIN: Itrongay, Madagascar
ref:Oyr113.5gr
|
Enlarge |
60
grms. yellow orthoclase crystal single
50.6 x 28.2 mm. Top crystal. Enhancement: none (N) |
stone PRICE
USD 1200.00 ORIGIN: Itrongay, Madagascar
ref:Oyr60gr
|
 |
55.50
grms. yellow orthoclase crystal single
47.2 x 29 mm. Top crystal. Enhancement: none (N) |
stone PRICE
SOLD ORIGIN: Itrongay, Madagascar
ref:Oyr5550g
|
Enlarge |
25.80
grms. yellow orthoclase crystal single
31 x 25.2 mm. Top crystal. Enhancement: none (N) |
stone PRICE
SOLD ORIGIN: Itrongay, Madagascar
ref:Oyr2580g
|
 |
143
grms. yellow orthoclase crystal single
56 x 50.5 mm. Top crystal. Enhancement: none (N) |
stone PRICE
USD 2790.00 ORIGIN: Itrongay, Madagascar
ref:Oyr14300g
|
| View:
3 different positions |
 |
|
To purchase a stone from this site click to ORDER
|
|
|
| Next pages »» ORTHOCLASE 2 ¦ ORTHOCLASE AFFORDABLE ¦ ORTHOCLASE FACET ¦ | |
General Information |
||||
| Chemical Formula: | KAlSi3O8 | |||
| Composition: | Molecular Weight = 278.33 gm | |||
| Potassium 14.05 % K 16.92 % K2O | ||||
| Aluminium 9.69 % Al 18.32 % Al2O3 | ||||
| Silicon 30.27 % Si 64.76 % SiO2 | ||||
| Oxygen 45.99 % O | ||||
| ______ ______ | ||||
| 100.00 % 100.00 % = TOTAL OxIDE | ||||
| Empirical Formula: | KAlSi3O8 | |||
| Environment: | Intrusive and extrusive igneous, and metamorphic rocks. | |||
| IMA Status: | Approved IMA 1960 | |||
| Locality: | Common world wide occurrences. Madagascar | |||
| Name Origin: | From the Greek orthos - "right" and kalo -" I cleave" in allusion to the mineral's right angle of good cleavage. | |||
| Synonym: | Adularia | |||
| Orthose | ||||
Orthoclase Images |
||||
| Faceted orthoclase |
|
Click on the picture to go to
faceted orthoclase
|
||
| © Image by A. Darbellay | ||||
Crystallography |
||||
| Axial Ratios: | a:b:c =0.6636:1:0.5534 | |||
| Cell Dimensions: | a = 8.625, b = 12.996, c = 7.193, Z = 4; beta = 116.016ø V = 724.57 Den(Calc)= 2.55 | |||
| Crystal System: | Monoclinic-Prismatic H-M Symbol (2/m) Space Group: C2/m | |||
| x Ray Diffraction: | By Intensity(I/Io): 3.18(1)4.02(0.9) 3.8(0.8) | |||
Physical Properties |
||||
| Cleavage: | [001] Perfect, [010] Good | |||
| Color: | colorless, greenish, grayish yellow, white, or pink. | |||
| Density: | 2.56 | |||
| Diaphaniety: | Transparent to translucent | |||
| Fracture: | Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. | |||
| Habits: | Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Massive - Granular - Common texture observed in granite and other igneous rock., Blocky - Crystal shape tends to be equant (e.g. feldspars). | |||
| Hardness: | 6 - Orthoclase | |||
| Luminescence: | None. | |||
| Luster: | Vitreous (Glassy) | |||
| Streak: | white | |||
Optical Properties |
||||
| Optical Data: | Biaxial (-), a=1.518, b=1.522, g=1.523-1.524, bire=0.0050-0.0060, 2V(Calc)=52-70, 2V(Meas)=65-75. Dispersion relatively strong. | |||
| Pleochroism (x): | colorless. | |||
| Pleochroism (y): | colorless. | |||
| Pleochroism (z): | colorless. | |||
Classification |
||||
| Dana Class: | Tectosilicate Al-Si Framework | |||
| with Al-Si frameworks | ||||
| (Na,Ba) feldspars | ||||
|
||||
|
||||
|
||||
| Celsian BaAl2Si2O8 I21/c 2/m | ||||
|
||||
|
||||
|
||||
| Strunz Class: | Silicates | |||
| ectosilicates (network) without anions unfamiliar to the tetraheders | ||||
| STRUNZ - Silicates [Tectosilicates (network) without anions unfamiliar to the tetraheders {Feldspar group, Buddingtonite - Orthocl | ||||
|
||||
|
||||
| Microcline KAlSi3O8 C1- -1 | ||||
|
||||
|
||||
|
||||
|
||||
|
||||
| Next pages »» ORTHOCLASE 2 ¦ ORTHOCLASE AFFORDABLE ¦ ORTHOCLASE FACET ¦ |
|
