Top Results for Colorless

Phenakite, also spelled phenacite, is a beryllium silicate mineral with the chemical formula Be2SiO4. It commonly forms transparent, colorless crystals but may also appear pale yellow, pink, or brown, and its hardness and relatively high refractive index allow suitable specimens to be cut as gemston...

Rock crystal is the colorless, transparent variety of quartz, a mineral composed of silicon dioxide. Its clarity and ability to form well-developed crystals distinguish it from colored quartz varieties such as amethyst and citrine, whose appearance is affected by impurities or structural changes. Pe...

Cerussite is lead carbonate, a mineral formed mainly in the oxidized zones of lead-bearing ore deposits. It crystallizes in the orthorhombic system and commonly appears as colorless, white, gray, or pale-colored crystals; twinned forms are a familiar feature of specimens. With a specific gravity of...

Hambergite is a rare beryllium borate mineral first described in 1883 by the Norwegian mineralogist W. C. Brøgger. It was named for the Swedish geographer Axel Hamberg. The mineral is usually colorless or pale and is known for strong optical properties, including high birefringence; transparent gem-...

White sapphire is the colorless, transparent variety of corundum, the mineral that forms ruby and colored sapphires. It has the same high hardness as other sapphire and is used in jewelry, including as a colorless center stone or as an alternative to diamond. Its lack of visible body color results f...

Achroite is the colorless variety of tourmaline. It is valued by mineral collectors because most tourmaline crystals show visible color, while achroite lacks the strong hues associated with varieties such as elbaite, schorl, or rubellite. It occurs chiefly in granitic pegmatites, including deposits...

Hyalite opal is a usually colorless, transparent to translucent form of opal with a glass-like appearance and rounded or botryoidal surfaces. Some specimens fluoresce bright green under ultraviolet light because trace uranium or uranyl compounds act as activators in the silica material. The fluoresc...

Rhodizite is a rare mineral composed primarily of cesium, potassium, beryllium, aluminum, boron, and oxygen. It belongs to the borate mineral group and commonly forms small, colorless to pale crystals. Rhodizite is notable for its high hardness, approximately 8 on the Mohs scale, and has been report...

Goshenite is the colorless variety of beryl, the mineral family that also includes emerald and aquamarine. Its name refers to Goshen, Massachusetts, where the variety was identified. Clear goshenite can be cut as a gemstone, although it is less widely used than colored beryl, and transparent specime...

White topaz is the colorless variety of topaz, an aluminum silicate fluoride hydroxide mineral with the composition Al2SiO4(F,OH)2. It has a glassy luster, a Mohs hardness of 8, and good clarity in suitable material, so it is cut for jewelry and sometimes used as a colorless simulant for diamond or...

Sanidine is the high-temperature form of potassium feldspar, with a composition close to KAlSi3O8 and a monoclinic crystal structure. It is commonly found in potassium-rich volcanic rocks such as rhyolite and other rocks that crystallized or equilibrated at high temperature; its rapid cooling can pr...

Natrolite is a zeolite-group tectosilicate mineral with the hydrated sodium aluminosilicate formula Na2Al2Si3O10·2H2O. It commonly forms colorless or white, slender needle-like crystals and can occur as radiating or fibrous aggregates in cavities and fractures of volcanic rocks. Natrolite is orthorh...