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- Chrysoprase abstract "Chrysoprase, chrysophrase or chrysoprasus is a gemstone variety of chalcedony (a cryptocrystalline form of silica) that contains small quantities of nickel. Its color is normally apple-green, but varies to deep green. The darker varieties of chrysoprase are also referred to as prase. (However, the term prase is also used to describe chlorite-included quartz, and to a certain extent is a color-descriptor, rather than a rigorously defined mineral variety.)Chrysoprase is cryptocrystalline, which means that it is composed of crystals so fine that they cannot be seen as distinct particles under normal magnification. This sets it apart from rock crystal, amethyst, citrine, and the other varieties of crystalline quartz. Other members of the cryptocrystalline silica family include agate, carnelian, and onyx. Unlike many non-transparent silica minerals, it is the color of chrysoprase, rather than any pattern of markings, that makes it desirable. The word chrysoprase comes from the Greek χρυσός chrysos meaning 'gold' and πράσινον prasinon, meaning 'green'.Unlike emerald which owes its green color to the presence of chromium, the color of chrysoprase is due to trace amounts of nickel compounds in the form of very small inclusions. The nickel reportedly occurs as different silicates, like kerolite or pimelite (not NiO mineral, bunsenite, as was reported before). Chrysoprase results from the deep weathering or lateritization of nickeliferous serpentinites or other ultramafic ophiolite rocks. In the Australian deposits, chrysoprase occurs as veins and nodules with brown goethite and other iron oxides in the magnesite-rich saprolite below an iron and silica cap.As with all forms of chalcedony, chrysoprase has a hardness of 6–7 on the Mohs hardness scale and a conchoidal fracture like flint.The best known sources of chrysoprase are Queensland, Western Australia, Germany, Poland, Russia, Arizona, California, and Brazil. The chrysoprase and Ni silicate ore deposit in Szklary, Lower Silesia, Poland, was probably the biggest European chrysoprase occurrence and possibly also the biggest in the world.A very similar mineral to chrysoprase is chrome chalcedony, in which the color is provided by chromium rather than nickel.".
- Chrysoprase thumbnail Chryzopras_Polsko.jpg?width=300.
- Chrysoprase wikiPageExternalLink min-952.html.
- Chrysoprase wikiPageID "1261589".
- Chrysoprase wikiPageLength "2976".
- Chrysoprase wikiPageOutDegree "39".
- Chrysoprase wikiPageRevisionID "699645280".
- Chrysoprase wikiPageWikiLink Agate.
- Chrysoprase wikiPageWikiLink Amethyst.
- Chrysoprase wikiPageWikiLink Arizona.
- Chrysoprase wikiPageWikiLink Brazil.
- Chrysoprase wikiPageWikiLink California.
- Chrysoprase wikiPageWikiLink Carnelian.
- Chrysoprase wikiPageWikiLink Category:Chalcedony.
- Chrysoprase wikiPageWikiLink Chalcedony.
- Chrysoprase wikiPageWikiLink Chlorite_group.
- Chrysoprase wikiPageWikiLink Chrome_chalcedony.
- Chrysoprase wikiPageWikiLink Chromium.
- Chrysoprase wikiPageWikiLink Cryptocrystalline.
- Chrysoprase wikiPageWikiLink Emerald.
- Chrysoprase wikiPageWikiLink Flint.
- Chrysoprase wikiPageWikiLink Gemstone.
- Chrysoprase wikiPageWikiLink Germany.
- Chrysoprase wikiPageWikiLink Goethite.
- Chrysoprase wikiPageWikiLink Greek_language.
- Chrysoprase wikiPageWikiLink Iron_oxide.
- Chrysoprase wikiPageWikiLink Laterite.
- Chrysoprase wikiPageWikiLink Magnesite.
- Chrysoprase wikiPageWikiLink Mohs_scale_of_mineral_hardness.
- Chrysoprase wikiPageWikiLink Nickel.
- Chrysoprase wikiPageWikiLink Onyx.
- Chrysoprase wikiPageWikiLink Ophiolite.
- Chrysoprase wikiPageWikiLink Poland.
- Chrysoprase wikiPageWikiLink Quartz.
- Chrysoprase wikiPageWikiLink Queensland.
- Chrysoprase wikiPageWikiLink Russia.
- Chrysoprase wikiPageWikiLink Saprolite.
- Chrysoprase wikiPageWikiLink Serpentinite.
- Chrysoprase wikiPageWikiLink Silicon_dioxide.
- Chrysoprase wikiPageWikiLink Ultramafic_rock.
- Chrysoprase wikiPageWikiLink Western_Australia.
- Chrysoprase wikiPageWikiLink File:Chrysoprase_stone_with_white_background.jpg.
- Chrysoprase wikiPageWikiLink File:Chryzopras_Polsko.jpg.
- Chrysoprase wikiPageWikiLinkText "Chrysoprase".
- Chrysoprase wikiPageWikiLinkText "chrysoprase".
- Chrysoprase wikiPageUsesTemplate Template:!.
- Chrysoprase wikiPageUsesTemplate Template:About.
- Chrysoprase wikiPageUsesTemplate Template:Citation_needed.
- Chrysoprase wikiPageUsesTemplate Template:Commons_category.
- Chrysoprase wikiPageUsesTemplate Template:Silica_minerals.
- Chrysoprase subject Category:Chalcedony.
- Chrysoprase hypernym Variety.
- Chrysoprase type Grape.
- Chrysoprase type Group.
- Chrysoprase type Group.
- Chrysoprase type Object.
- Chrysoprase type Tectosilicate.
- Chrysoprase comment "Chrysoprase, chrysophrase or chrysoprasus is a gemstone variety of chalcedony (a cryptocrystalline form of silica) that contains small quantities of nickel. Its color is normally apple-green, but varies to deep green. The darker varieties of chrysoprase are also referred to as prase.".
- Chrysoprase label "Chrysoprase".
- Chrysoprase sameAs Q429960.
- Chrysoprase sameAs Krizopraz.
- Chrysoprase sameAs Crisopras.
- Chrysoprase sameAs Chryzopras.
- Chrysoprase sameAs Krysopras.
- Chrysoprase sameAs Chrysopras.
- Chrysoprase sameAs Χρυσοπράσιο.
- Chrysoprase sameAs Krizopraso.
- Chrysoprase sameAs Crisoprasa.
- Chrysoprase sameAs Krüsopraas.
- Chrysoprase sameAs عقیق_سبز.
- Chrysoprase sameAs Chrysoprase.
- Chrysoprase sameAs כריזופראס.
- Chrysoprase sameAs Crisoprasio.
- Chrysoprase sameAs クリソプレーズ.
- Chrysoprase sameAs Хризопраз.
- Chrysoprase sameAs 녹옥수.
- Chrysoprase sameAs Chrysoprasius.
- Chrysoprase sameAs Chrizoprazas.
- Chrysoprase sameAs Prazems.
- Chrysoprase sameAs Chrysopraas.
- Chrysoprase sameAs Krysopras.
- Chrysoprase sameAs Chryzopraz.
- Chrysoprase sameAs Crisoprásio.
- Chrysoprase sameAs m.04n362.
- Chrysoprase sameAs Хризопраз.
- Chrysoprase sameAs Crisoprasu.
- Chrysoprase sameAs Chryzopras.
- Chrysoprase sameAs Хрисопрас.
- Chrysoprase sameAs Krysopras.
- Chrysoprase sameAs Krizopras.
- Chrysoprase sameAs Хризопраз.
- Chrysoprase sameAs Q429960.
- Chrysoprase sameAs 绿玉髓.
- Chrysoprase wasDerivedFrom Chrysoprase?oldid=699645280.
- Chrysoprase depiction Chryzopras_Polsko.jpg.
- Chrysoprase isPrimaryTopicOf Chrysoprase.