Hyalite
Hyalite is typically a colorless, glassy choice of Opal, also understood as Opal-AN. Opal-AN is definitely an silica-glass that is amorphous. The “A” stands for amorphous and the “N” stands for the structure that is network-like to silica glass. Hyalite, as with every forms of Opal, contains a percetage that is for certain of. Hyalite contains about 3-8% water. As a result of structure that is homogeneous is internal Opal will maybe not show any opalescence or “play of color”. Hyalite may not show any play of color, but it can show a powerful color that is shortwave UV light that is green. You might find this bright color that is green shortwave UV light in the event that you hover your cursor throughout the photo above. Hyalite is valued as being a mineral specimen with its glassy that is appealing public however it is extremely rarely available as being a treasure that is faceted.
Hyalite was known as in 1794 by German geologist Abraham Gottlob Werner (1749-1817) through the Greek word ϋάλος (hýalos), meaning cup, for its resemblance to glass. Hyalite has additionally been known by the synonyms Amiatite, Hyaline, Jalite, Lava Glass and Müller’s Glass. Amiatite was called in 1802 by Italian naturalist Giorgio Santi (1746–1822) because of its locality at Monte Amiato, Tuscany, Italy. Jalite may be the translation that is italian Hyalite. The name Lava Glass is a result of Hyalite frequently being found in volcanic fumaroles. Müller’s Glass is called after its discoverer Franz-Joseph Müller von Reichenstein (1740 or 1742 – 1825 or 1826), Austrian mineralogist and mining engineer. The name Hyalite in addition has been used being fully a synonym of Axinite (Klaproth, 1797).
Hyalite distribution: at Valeč, Doupov, Karlovy Differ Region, Bohemia, Czech Republic. At Hosszú Hill, Megyaszó, Zemplén Mts, Borsod-Abaúj-Zemplén County, Hungary. Portugal # 2 quarry, Malpartida, Almeida, Guarda District, Portugal. In Australia at Squaretop Mountain, Kaimkillenbun, Wambo Shire, Western Downs Region, Queensland; Boral Limited quarry, Bundoora, City of Whittlesea, Greater Melbourne area, Victoria; Eastern Hill, Mount Anakie, Anakie, City of Greater Geelong, Victoria; Mt Painter area, Arkaroola area, North Flinders Ranges, Flinders Ranges, South Australia. In Austria at Osterwitz, Deutschlandsberg, Koralpe, Styria; Stradner Kogel, Wilhelmsdorf, Bad Gleichenberg, Styria; Holler quarry, Badersdorf, Oberwart, Burgenland; Feldspar quarry, Laas, Fresach, Millstatt lake ridge, Carinthia. In Brazil at Itinga, Jequitinhonha valley, Minas Gerais and Conselheiro Lafaiete, Minas Gerais. In France at Le Croustet, Ceyssac, Le Puy-en-Velay, Haute-Loire, Auvergne and other locations. In Germany at Fohberg Quarry, Bötzingen, Kaiserstuhl, Baden-Württemberg and at the Clara Mine, Rankach valley, Oberwolfach, Wolfach, Ebony Forest, Baden-Württemberg. In the Lesbos Island, Lésvos Prefecture, Aegean Islands Department, Greece. In Italy at Ploaghe, Sassari Province, Sardinia; and at the Puricelli quarry, Cuasso Monte that is Valley that is al Province, Lombardy or a few other Italian locations. In Japan at Hosaka, Fukushima Prefecture, Tohoku Region, Honshu Island. In Mexico at Tepetate, Mun. de Villa de Arriaga, San Luis Potosí. In Namibia at Erongo Hill, Erongo Area. In Brand New Zealand at Lake Rotokawa, Taupo, Waikato, North Island and Maerewhenua, Otago, South Island. In Pakistan at Stak Nala, Haramosh Mts., Skardu District, Baltistan, Gilgit-Baltistan. In Poland at Jordanów, Gogołów-Jordanów Massif, Lower Silesia. In Portugal at the Portugal No. 2 quarry, Malpartida, Almeida, Guarda District. In Slovakia during the Coal deposit, Handlová, Prievidza County, Trenčín Region. In the united states at the Blue Bell Mine, Baker, Soda Lake Mts, San Bernardino County, California; Road part quarry on Hwy 131, Wolcott, Eagle County, Colorado; Girard, Girard District, Burke County, Georgia; ; Route 13 area, Lunenburg, Worcester County, Massachusetts; Chalk Mountain Mine, Spruce Pine, Spruce Pine District, Mitchell County, vermont; Ryerson Hill Quarries, Paris, Oxford County, Maine; Richardson Ranch, Madras, Jefferson County, Oregon; Aurora, Sevier County, Utah; and many other United States Of America locations.
| Chemical Formula: | SiO2 · nH2O |
| Hydrated Silicon Dioxide |
| Crystal Habit: | Globular and botryoidal masses and irregular crusts |
| Cleavage: | None observed |
| Fracture: | Conchoidal |
| Tenacity: | Brittle |
| Moh’s Hardness: | 5.5 – 6.5 |
| Density: | 1.9 – 2.2 (g/cm3); varies with water content |
| Luminescence: | Fluorescent; may show strong green fluorescence under SW UV light. |
| Radioactivity: | Not Radioactive |
| Color: | Colorless, white, creme-colored, yellow, orange; no opalescence (play of color) |
| Transparency: | Transparent, translucent |
| Luster: | Vitreous, sub-vitreous |
| Refractive Index: | 1.44 – 1.46 |
| Birefringence: | 0.000 (isotropic); may show strain birefringence (Graetsch, 1994) |
| Dispersion: | n/a |
| Pleochroism: | None |
