Scheelite

Hundreds of fossils are locked in glass cases, specimens from all over southern Africa: shells and worms and nautiluses and seed ferns and trilobites, and minerals, too; yellow-green crystals and gleaming clusters of quartz; mosquitoes in drops of amber; scheelite, wulfenite. ❋ Anthony Doerr (2010)

(As an aside, the mineral scheelite (Ca (WO4, MoO4), calcium tungstate-molybdate) was named after Scheele in honor of his discovery of molybdenum.) ❋ Unknown (2008)

Tungsten is retrieved from the ore minerals scheelite (CaWO4, calcium tungstate) and wolframite ((Fe, Mn) WO4, iron-manganese tungstate). ❋ Unknown (2008)

Another mining sector which employs optical evaluation is scheelite mining, where the mine face is irradiated with an ultra-violet lamp which induces fluorescence of the scheelite. ❋ Unknown (1993)

This is especially important for those valuable minerals which exhibit a brittle to very brittle tenacity, such as cassiterite, sphalerite and the tungsten minerals scheelite and wolframite. ❋ Unknown (1993)

Sphalerite, cassiterite (tin ore) and scheelite are only a few examples of this type of brittle mineral ore (see Table). ❋ Unknown (1993)

Tungsten ores contain tungsten principally in the form of the minerals scheelite (calcium tungstate), ferberite (iron tungstate), hübnerite ❋ Unknown (1915)

In these occurrences the tungsten mineral is almost invariably scheelite, and is associated with calcite, garnet, pyroxene, and other silicates. ❋ Unknown (1915)

Both wolfram and scheelite are of considerable importance as a source of tungstic acid for the manufacture of sodium tungstate, which is used as a mordant and for some other purposes, and as a source of metallic tungsten, which is used in steel-making. ❋ Cornelius Beringer (1886)

Tungsten occurs in nature only in the oxidised state, or as tungstic acid (WO_ {3}), either free, as in wolframine, or combined with oxides of manganese and iron, as in wolfram, or with lime, as in scheelite. ❋ Cornelius Beringer (1886)

Full production ~ 400 STUs per day Mill capable of APT and high grade scheelite as market demand ❋ Samanthafox (2010)

Surrounding and partially overlapping the molybdenum zone is a much more extensive tungsten zone where scheelite occurs in the northeast-trending sheeted quartz veins structure. ❋ Unknown (2010)

Wavering hawaii beach vacations thalidomide, air frypan, sanies reimbursement, maybe gaslight scheelite and air anastalsis to economiser. ❋ Unknown (2009)

Wide zones of mineralization consisting of numerous quartz veins and veinlets continue to be intersected in the drill core containing varying amounts of scheelite and molybdenite. ❋ Unknown (2008)

The main sulphide minerals are pyrite, arsenopyrite and pyrrhotite, while accessory minerals include bismuthinite, scheelite and sphalerite. ❋ Unknown (2008)

The middle horizon, or discovery horizon, contains the majority of the significant gold intervals and has the highest concentrations of arsenopyrite, bismuthinite and scheelite. ❋ Unknown (2008)

Each sample for which scheelite is noted using an ultraviolet light, along with an appropriate buffer zone on each side of the mineralized sample, is sent to the ALS Chemex sample preparation facility in Winnemucca, NV. ❋ Unknown (2008)

Surrounding and partially overlapping the molybdenum zone is a much more extensive tungsten zone where scheelite occurs in northeast-trending sheeted quartz veins in skarn. ❋ Unknown (2008)

a high grade (+65%) scheelite (WO (3)) concentrate product. ❋ Unknown (2010)