Ametrine Emerald Cut
Ametrine containing amethyst and citrine, from Bolivia

Naturally occurring variety of quartz.

- Ametrine

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Violet variety of quartz.

Amethyst cluster from Magaliesburg, South Africa.
Main amethyst-producing countries
Faceted amethyst
Emerald cut amethyst
Amethyst crystals from Mexico
An amethyst geode that formed when large crystals grew in open spaces inside the rock.
Amethyst from Brazil in the Mineral museum in India
Roman intaglio engraved gem of Caracalla in amethyst, once in the Treasury of Sainte-Chapelle.
Uninscribed amethyst scarab at the center of a string of amethyst ball beads. Middle Kingdom. From Egypt. The Petrie Museum of Egyptian Archaeology, London

When partially heated, amethyst can result in ametrine.


Hard, crystalline mineral composed of silica .

Quartz crystal cluster from Tibet
Quartz crystal demonstrating transparency
A synthetic quartz crystal grown by the hydrothermal method, about 19 cm long and weighing about 127 grams
Granite rock in the cliff of Gros la Tête on Aride Island, Seychelles. The thin (1–3 cm wide) brighter layers are quartz veins, formed during the late stages of crystallization of granitic magmas. They are sometimes called "hydrothermal veins".
Crystal structure of α-quartz (red balls are oxygen, grey are silicon)
Herkimer diamond
Rock crystal
Blue quartz
Rose quartz
Rutilated quartz
Sceptred quartz
Smoky quartz
Rock crystal jug with cut festoon decoration by Milan workshop from the second half of the 16th century, National Museum in Warsaw. The city of Milan, apart from Prague and Florence, was the main Renaissance centre for crystal cutting.<ref>{{cite book |title=The International Antiques Yearbook |year=1972 |page=78 |publisher=Studio Vista Limited |url=|quote=Apart from Prague and Florence, the main Renaissance centre for crystal cutting was Milan.}}</ref>
Synthetic quartz crystals produced in the autoclave shown in Western Electric's pilot hydrothermal quartz plant in 1959
Fatimid ewer in carved rock crystal (clear quartz) with gold lid, c. 1000.

It is then referred to as ametrine.


Piece of mineral crystal which, in cut and polished form, is used to make jewelry or other adornments.

Group of precious and semiprecious stones—both uncut and faceted—including (clockwise from top left) diamond, uncut synthetic sapphire, ruby, uncut emerald, and amethyst crystal cluster.
A collection of gemstone pebbles made by tumbling the rough stones, except the ruby and tourmaline, with abrasive grit inside a rotating barrel. The largest pebble here is 40 mm long.
Spanish emerald and gold pendant at Victoria and Albert Museum
Enamelled gold, amethyst, and pearl pendant, about 1880, Pasquale Novissimo (1844–1914), V&A Museum number M.36-1928
Raw sapphire stones stored in a rural commercial cutting plant in Thailand.
A diamond cutter in Amsterdam in the Netherlands in 2012
Nearly 300 variations of diamond color exhibited at the Aurora display at the Natural History Museum in London.
A variety of semiprecious stones

Most citrine is made by heating amethyst, and partial heating with a strong gradient results in "ametrine" – a stone partly amethyst and partly citrine.

List of minerals

List of minerals for which there are articles on Wikipedia.

Amethyst crystals – a purple quartz
Apophyllite crystals sitting right beside a cluster of peachy bowtie stilbite
Aquamarine variety of beryl with tourmaline on orthoclase
Arsenopyrite from Hidalgo del Parral, Chihuahua, Mexico
Aurichalcite needles spraying out within a protected pocket lined by bladed calcite crystals
Austinite from the Ojuela Mine, Mapimí, Durango, Mexico
Ametrine containing amethyst and citrine, from Bolivia
Baryte (included by malachite) on malachite, from Shangulowé Mine, Kambove, Central area, Katanga, Democratic Republic of Congo
Spiky calcite scalenohedra with a coating of whitish benstonite on a layer of teal-colored fluorite
Thin tabular biotite cluster
Brookite from Kharan, Balochistan, Pakistan
Radiating spray of colorless wheatsheaf calcite crystals on matrix, from Iraí, Rio Grande do Sul, Brazil
Rhombohedrons of calcite that appear almost as books of petals, piled up 3-dimensionally on the matrix, from Eastern Europe
Sky blue, prismatic crystals of celestine from Majunga, Madagascar
Pocket cavity of small chrysocolla stalactites from Ray Mine, Scott Mountain area, Mineral Creek District, Arizona, USA
Cinnabar on dolomite
The slightly misshapen octahedral shape of this rough diamond crystal in matrix is typical of the mineral
Emerald on quartz, from Carnaiba Mine, Pindobaçu, Campo Formoso ultramafic complex, Bahia, Brazil
Translucent fluorapophyllit-(K) crystal and stilbite, from Jalgaon District, Maharashtra, India
Deep green isolated fluorite crystal showing cubic and octahedral faces, set upon a micaceous matrix
Gold vein stockwork in limonite, from Gold Flake Vein, Farncomb Hill, Breckenridge Mining District, Summit County, Colorado, USA
Brazilian trigonal hematite crystals
Hübnerite and quartz
Inyoite from Monte Azul deposit, Sijes, Salta, Argentina
Benitoite (blue), joaquinite-(Ce) (brown) and neptunite (dark red) on natrolite (white), from Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
Kainosite-(Y) from the Amphibolite quarry, Haslach, Black Forest, Baden-Württemberg, Germany
Kröhnkite from Cuquicamata Mine, Chuquicamata District, Calama, El Loa Province, Antofagasta Region, Chile
Langite from Elsass, France
Legrandite on limonite
Liddicoatite on quartz and feldspar
Magnetite from Speen Ghar, Nangarhar Province, Afghanistan
Manganite from Ilfeld, Thuringia, Germany
Mesolite at the Carnegie Museum of Natural History, Pittsburgh, Pennsylvania, USA
Mimetite on limonite matrix
Needles of natrolite on deep pink inesite
Neptunite from California, USA
Boulder opal, Carisbrooke Station near Winton, Queensland, Australia
Paravauxite and sigloite crystals associated with micro crystallized iron-stained wavellite needles on matrix
Pectolite from Paterson, Passaic County, New Jersey, USA
Phosphophyllite from Cerro de Potosí, Potosí Department, Bolivia
Pyrrhotite on quartz
Crystals of cherry red ruby in matrix
Rock crystal
Acicular colorless scolecite crystals in a group with pale green apophyllite and very light pink stilbite
Gypsum (selenite variety): Santa Eulalia District, Chihuahua, Mexico
Serandite clusters from Poudrette quarry, Mont Saint-Hilaire, Montérégie, Québec, Canada
Botryoidal balls of shattuckite, from Otjikotu, Kaokoveld, Kunene, Namibia
Ball of stepped stannite crystals flanked by splaying GEM quartzes and golden chalcopyrite at its upper edge, from Yaogangxian Mine, Yizhang County, Chenzhou Prefecture, Hunan Province, China
Crystal of titanite with adularia and minor clinochlore on matrix
Fluorite crystal sitting beside a glassy, dark green tourmaline crystal, which itself sits atop a green tourmaline of a lighter color. All sit on a bed of sparkly, bladed stark white albite
Crystals of turquoise, from Copper Cities Mine, Globe-Miami District, Arizona, USA
Crystals of tourmaline (uvite variety) on quartz, from Pomba pit, Serra das Éguas, Brumado, Bahia, Brazil
Vanadinite from the Mibladen Mining District, Morocco
Deep green balls of wavellite in exposed pocket, from Mauldin Mountain Quarries, Montgomery County, Arkansas, USA
Radial fibrous inesite and xonotlite from Northern Cape Province, South Africa
Zeolite with heulandite on quartz
Zircon from Gilgit, Pakistan

Ametrine (variety of quartz)

List of portmanteaus

Selection of portmanteau words.

The original Gerrymander pictured in an 1812 cartoon. The word is a portmanteau of Massachusetts Governor Elbridge Gerry's name with salamander.

ametrine, a gemstone composed of amethyst and citrine

Huáscar Aparicio

Bolivian folk singer.

In 2004, Huáscar participated in a competition based on the exhibition of precious stones known as bolivianitas, which inspired him to compose the song entitled La bolivianita.