Matches in DBpedia 2014 for { <http://dbpedia.org/resource/Helenite> ?p ?o. }
Showing items 1 to 23 of
23
with 100 items per page.
- Helenite abstract "Helenite, also known as Mount St. Helens obsidian, emerald obsidianite, and ruby obsidianite, is a synthetic gemstone made from the fused volcanic rock dust from Mount St. Helens. Helenite was first discovered accidentally after the eruption of Mount St. Helens in 1980. Workers from the Weyerhaeuser Timber Company were attempting to salvage equipment damaged after the volcanic eruption. Using acetylene torches, they noticed that the intense heat was melting the nearby volcanic ash and rock and turning it a greenish color. The silica, aluminium, iron, and trace amounts of chromium and copper present in the rocks and ash in the area, combined with the heat of the torches, transformed the volcanic particles into a compound that would be later commercially replicated as helenite. As word of the discovery spread, jewelry companies took note and began to find ways to reproduce the helenite. Helenite is made by heating rock dust and particles from the Mount St. Helens area, in a furnace to a temperature of approximately 2700 degrees F. Although Helenite and obsidian are both forms of glass, helenite differs from obsidian in that it is man made. However, obsidian, along with silica quartz can serve as a component of helenite. The stone has found footing in the jewelry industry because of its emerald-like color, good refractive index, and durability. It is seen as an inexpensive alternative to other naturally occurring green gemstones like emerald and peridot. Helenite can also come in various red, green and blue varieties.".
- Helenite thumbnail Emerald_Obsidianite_Jewelry_600px.jpg?width=300.
- Helenite wikiPageExternalLink indexh.shtml.
- Helenite wikiPageID "1640198".
- Helenite wikiPageRevisionID "578708314".
- Helenite hasPhotoCollection Helenite.
- Helenite subject Category:Gemstones.
- Helenite subject Category:Glass.
- Helenite type Crystal114883206.
- Helenite type Gem114699752.
- Helenite type Gemstones.
- Helenite type Matter100020827.
- Helenite type PhysicalEntity100001930.
- Helenite type Solid115046900.
- Helenite comment "Helenite, also known as Mount St. Helens obsidian, emerald obsidianite, and ruby obsidianite, is a synthetic gemstone made from the fused volcanic rock dust from Mount St. Helens. Helenite was first discovered accidentally after the eruption of Mount St. Helens in 1980. Workers from the Weyerhaeuser Timber Company were attempting to salvage equipment damaged after the volcanic eruption.".
- Helenite label "Helenite".
- Helenite sameAs m.05jvhh.
- Helenite sameAs Q5703937.
- Helenite sameAs Q5703937.
- Helenite sameAs Helenite.
- Helenite wasDerivedFrom Helenite?oldid=578708314.
- Helenite depiction Emerald_Obsidianite_Jewelry_600px.jpg.
- Helenite isPrimaryTopicOf Helenite.
