TIGER EYE, Russian pigment
Tiger's eye is a veined rock, an ornamental and semi-precious stone, formed by the replacement of thin fibrous veins of the mineral riebeckite (an alkaline amphibole) with translucent quartz or chalcedony. This stone has a beautiful golden yellow or golden brown color and a silky luster on a polished surface. Tiger's eye's color is due to inclusions of iron hydroxides (goethite FeOOH, limonite).
The original mineral, crocidolite, is of magmatic origin. It forms in subalkaline granites along with quartz and other minerals, where amphiboles form along fractures.
It occurs in veined form alongside tiger's eye.
The replacement of riebeckite (an ancient name for crocidolite) with quartz and iron hydroxides occurs under hydrothermal conditions, which is why tiger's eye, like hawk's eye, can be classified as minerals of hydrothermal origin. Furthermore, the replacement occurs first with iron hydroxides and then with quartz.
In ancient Rome, builders embedded pieces of "tiger's eye" between the stones of roads to ensure nighttime visibility.
This mineral produces a beautiful yellow-brown pigment.
Chemical Description: Mineral. Silicon dioxide with impurities of iron hydroxide.
•Chemical Formula: SiO2 + FeOOH
•Lightfastness: 8
•Alkali Resistance: 5
•Lime Resistance: 5
•Acid Resistance: 5
•Color Index: No data
•Suitable for: Acrylic, Fresco, Ceramic, Oil, Tempera, Watercolor/Gouache, Silicate Binder, Cement/Gesso
•Color: Golden Yellow-Brown
•Form: Powder
•High Coverage
| TIGER EYE, Russian pigment, 50 gr. | Stock: 0 - COD. CRTEYE50 | |||
| € 10,00 |
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| TIGER EYE, Russian pigment, 100 gr. | Stock: 0 - COD. CRTEYE100 | |||
| € 18,00 |
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