enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Prasiolite - Wikipedia

   en.wikipedia.org/wiki/Prasiolite

   Prasiolite (also known as green quartz, green amethyst or vermarine) is a green variety of quartz. Since 1950, almost all natural prasiolite has come from a small Brazilian mine, [citation needed] but it has also been mined in the Lower Silesia region of Poland. Naturally occurring prasiolite has also been found in the Thunder Bay area of ...

3. Quartz - Wikipedia

   en.wikipedia.org/wiki/Quartz

   Pure quartz, traditionally called rock crystal or clear quartz, ... Prasiolite, also known as vermarine, is a variety of quartz that is green in color. [52]

4. Amethyst - Wikipedia

   en.wikipedia.org/wiki/Amethyst

   Green quartz is sometimes called green amethyst; the scientific name is prasiolite. [9] Other names for green quartz are vermarine and lime citrine. Amethyst frequently shows color zoning, with the most intense color typically found at the crystal terminations. One of gem cutters' tasks is to make a finished product with even color. Sometimes ...

5. Aventurine - Wikipedia

   en.wikipedia.org/wiki/Aventurine

   Chrome-bearing fuchsite (a variety of muscovite mica) is the classic inclusion and gives a silvery green or blue sheen. Oranges and browns are attributed to hematite or goethite . Because aventurine is a rock , its physical properties vary: its specific gravity may lie between 2.64–2.69 and its hardness is somewhat lower than single-crystal ...

6. Chalcedony - Wikipedia

   en.wikipedia.org/wiki/Chalcedony

   Chrysoprase (also spelled chrysophrase) is a green variety of chalcedony, which has been colored by nickel oxide. (The darker varieties of chrysoprase are also referred to as prase. However, the term prase is also used to describe green quartz and to a certain extent is a color-descriptor, rather than a rigorously defined mineral variety.)

7. Amazonite - Wikipedia

   en.wikipedia.org/wiki/Amazonite

   Amazonite, also known as amazonstone, [4] is a green tectosilicate mineral, a variety of the potassium feldspar called microcline. [4] [5] [6] Its chemical formula is KAlSi 3 O 8, [1] [7] which is polymorphic to orthoclase.