Tectoslicate Minerals Gallery M&W Minerals

Tectosilicates Gallery

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Tectosilicates are composed of interconnected SiO₄ tetrahedrons where all the oxygens are shared with other tetrahedrons yielding a silicon to oxygen ratio of 1:2. Where only silicon and oxygen are present gives rise to the Quartz family composed of SiO₂. In most other Tectosilicate minerals, the aluminum ion can substitutes for the silicon ion in the tetrahedrons are called with Al-Si framework.

Feldspar group (Albite, Microcline, Orthoclase, Oligoclase, Anorthite, and Feldspar varieties of Moonstone, Amazonite, Labradorite, Pericline and others), the Feldspathoid group (Sodalite, Lazulite, Leucite, Nepheline and others), Scapolite and others

minerals in alphabetical order by first letter only

click on the title link or photo to proceed to a specimen's page

A

6861 Albite with possible Eosphorite

Minas Gerais, Brazil
Ex. Luiz Menezes
7.1 x 2.9 x 2.8 cm
$25

6755 Microcline variety: Amazonite, Albite, Smoky Quartz

Kashale Village, 20 km S. of Konso, Ethiopia
7.5 x 6.5 x 4.5 cm
SOLD

6125 K-Feldspar variety: Valencianite, Milarite, Quartz

Mina Valenciana, Guanajuato, Mun. de Guanajuato, Guanajuato, Mexico
1970s
9.4 x 8.7 x 3.5 cm
$70

4908 Amazonite

Jefferson Co., Colorado
5.1 x 4 x 3.4 cm
$35

4737 Amazonite, Albite

Jefferson Co., Colorado
5.3 x 4.5 x 5 cm
$50

3840 Adularia with Included Chlorite

Wana, South Waziristan, Federally Administered Tribal Areas (FATA), Pakistan
5.7 x 3.8 x 2.6 cm
$50

H

2124 Sodalite varierty: Hackmanite

Poudrette Quarry, Mont Saint-Hilaire, Rouville RCM, Monteregie, Quebec, Canada
Pre. 1975
9.7 x 12 x 4.6 cm
$85

M

6880 Myrickite - Cinnabar Included in Opal - 2 pieces

Beaty, Bare Mountain, Nye Co., Nevada
Ex. Universirty of Michigan Geological Dept. #5893
9.0 x 6.0 x 5.7
and 9.1 x 7.4 x 5.4 cm
$75

4360 Microcline, Smoky Quartz, Albite, Chamosite

Moat Mountain, Carroll Co., New Hampshire
10.6 x 9.7 x 6.2 cm
SOLD

2375 Marialite

Santa Maria do Jetiba, Espirito Santo, Brazil
5.6 x 0.7 x 0.5 cm
$35

O

6989 Opalized Bivalve Shell

Lightning Ridge, Finch Co., New South Wales, Australia
Ex. Vivian Randall
3.1 x 2.8 x 1.8 cm
SOLD

5942 Fluorescent Hyaline Opal with Included Uranium Compounds

Mina el Padre (Mina Esperanza), Mapimi, Durango, Mexico
UV Fluorescent
11.1 x 7.7 x 4.5 cm
$150

5859 Opalized Green Petrified Wood

Hell's Canyon, Oregon/Idaho border area
8.5 x 7.1 x 5.9 cm
$35

P

4488 Opal in Rhyolite Matrix (reconstituted)

Mexico
Ex. Vivian Randall
3.8 x 2.2 x 2.3 cm
$35

S

6902 Sodalite variety Hackmanite Ilimaussaq complex, Kujalleq, Greenland UV Fluorescent Ex. CBWARD Fluorescent Minerals 5 x 3.8 x 3.4 cm $75	6783 Scapolite Ontario, Canada Ex. Robert Gannon 8.6 x 8.2 x 7.1 cm Double terminated crystal is 6.7 cm long. $45	6307 Sunstone (Feldspar with Included Hematite) Keeranur, Dindigul district, Tamil Nadu, India 7 x 7.3 x 3.7 cm $50
5192 Sodalite Crystals, Hornblende Monte Somma, Somma-Vesuvius Complex, Naples Province, Campania, Italy Ex. University of Michigan - 1933, Ex. Cureton Mineral Co., Ex. Southwest Mineral Co., Ex. Carnegie Museum - White collection 5.7 x 4.7 x 3.8 cm $50	4447 Spessartine Garnet, Albite and Muscovite Shengus, Gilgit-Skardu Road, Northern Area, Pakistan 9.4 x 4.2 x 3.5 cm The spessartine crystal is 1.8 cm. $150

T

2886 Tourmaline and Botryoidal Fluorite on Albite

Erongo Mountain, Erongo Region, Namibia
6.4 x 3.5 x 3.3 cm
$125

V

6410 K-Feldspar variety: Valencianite with Quartz Pseudomorph after Calcite

Mina Valencia, Guanajuato, Mexico
al₂PO₄(OH)₃
Ex. Robert Gannon, 1960/70s
6.7 x 5.9 x 3.3 cm
$45

Specimens which have this class of minerals as an associated mineral

6472 Corundum (Sapphire), Albite-Anorthite Series, Biotite Gallatin Co., Montana Ex. R. Gannon 10 x 7.4 x 4.9 cm $40	2107 Fluorescent Calcite and Opalite Mix Nye Co., Nevada, USA Prior to 1975 9 x 7.2 x 3.7 cm $35	2925 Datolite, Copper, Microcline, and Epidote Butler lode, Caledonia Mine, Ontonagon Co., Michigan, USA 4.7 x 2 x 2.5 cm $50
6031 Bicolor Fluorapatite, Albite Golconda district, Governador Valadares, Doce valley, Minas Gerais, Brazil 4.8 x 3.5 x 2.9 cm $125	4930 Fluorapatite, Albite variety Cleavelandite Golconda pegmatite, Golconda district, Governador Valadares, Doce valley, Minas Gerais, Brazil 7.7 x 6 x 3.4 cm $85	5839 Triangular Bicolor Lepidolite in Quartz and Albite Matrix Itinga, Minas Gerais, Brazil 8.8 x 7.3 x 9.7 cm $25
5983 Muscovite, Titanite, Albite, Chlorite, Hematite Cavagnoli glacier area, Bavona Valley, Maggia Valley, Ticino (Tessin), Switzerland Ex. Wolfgang Henkel 5.2 x 4.4 x 2.8 cm SOLD	6040 Smoky Quartz, Microcline Teller Co., Colorado 12 x 6.7 x 7.7 cm $75	5471 Quartz, Albite variety: Pericline, Muscovite, minor Hematite and Chlorite Tyrol, Austria 7.6 x 4.8 x 5.7 cm $30
6924 Rhodochrosite, Elpidite, Leifite, Calcite, Albite Poudrette Quarry, Mont Saint-Hilaire, Rouville RCM, Monteregie, Quebec, Canada Elpidite - Na₂ZrSi₆O₁₅·3H₂O, Leifite - Na₇Be₂(Si₁₅Al₃)O₃₉(F,OH)₂ 5.2 x 5.8 x 4.4 cm largest rhodochrosite crystals is 5 mm on longest edge $75	6038 Rhodochrosite, Elpidite, Leifite, Calcite, Albite Poudrette Quarry, Mont Saint-Hilaire, Rouville RCM, Monteregie, Quebec, Canada Elpidite - Na₂ZrSi₆O₁₅·3H₂O, Leifite - Na₇Be₂(Si₁₅Al₃)O₃₉(F,OH)₂ 5.1 x 4.4 x 4.4 cm $150	6640 Smoky Quartz, Schorl Tourmaline, Fluorescent Hyaline Opal Erongo Mountain, Erongo Region, Namibia 15.2 x 11.5 x 6.3 cm $350
6636 Spessartine Garnet on Microcline Tongbei, Fujian, China 12.8 x 6.7 x 4 cm $150	4408 Smoky Quartz with Included Hematite, Goethite Pseudomorphs after Siderite, Microcline Teller Co., Colorado 15.8 x 6.6 x 4.6 cm $85	3899 Schorl Tourmaline, Albite, Smoky Quartz Erongo, Namibia 6 x 4.6 x 4 cm $50
2534 Spessartine Garnet on Albite Navegadora Mine, Conselheiro Pena, Minas Gerais, Brazil 5.8 x 4.2 x 4.1 cm $100	6711 Double Terminated Yellow Topaz on Oorthoclase Klein Spitzkoppe, Spitzkopje Area, Karibib Constituency, Erongo Region, Namibia 4.8 x 3.4 x 2 cm $75	6471 Schorl Tourmaline, Albite, Hyaline Opal Erongo Mountain, Erongo Region, Namibia 4.4 x 3.8 x 2.3 cm $30
6076 Topaz, Microline Klein Spitzkopje (Kleine Spitzkoppe) granite stock, Spitzkopje Area, Karibib Dist., Erongo, Namibia 4.7 x 3.8 x 2.4 cm $45	1678 Tourmaline on Feldspar Location Unknown 5.3 x 4.6 x 3.2 cm $25

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Specimens which have this class of minerals as an associated mineral

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