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Halite
- Undated
While its mineral name is halite, this substance is also commonly known as rock salt. Rock salt is composed of sodium chloride, an essential compound the human body uses to absorb nutrients and maintain blood pressure.
- Subject Salt, Precious stones, Minerals
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Olivine
- Undated
Olivine is a mineral with a distinct green color and granular-shaped crystals. It is one of the first minerals to cool and crystallize from magma. Recently, olivine has been used as an alternative to silica sand and…
- Subject Precious stones, Minerals, Olivine
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Calcite
- Undated
Calcite is one of the most widely used minerals. It is primarily composed of the chemical compound calcium carbonate. Calcite is also often used in demonstrations of double refraction, in which light is split into two…
- Subject Precious stones, Minerals, Calcite
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Fluorite
- Undated
Fluorite (also called fluorspar) is the crystal form of the inorganic compound calcium fluoride. The term "fluorescence," a type of luminescence by a substance that has absorbed light or radiation, is derived from this…
- Subject Precious stones, Minerals, Fluorspar
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Barite
- Undated
Barium (atomic symbol Ba) is an alkaline Earth metal. Barite (also spelled baryte) is a mineral composed of barium sulfate. It is used in paints, inks, paper, and rubber. It is also used in radiology for diagnostic…
- Subject Precious stones, Minerals, Barite
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Tourmaline
- Undated
Boron (atomic symbol B), a naturally occuring Earth element, was first isolated by Sir Humphry Davy and Joseph Louis Gay-Lussac and Louis Jacques Thénard in 1808. Tourmaline is a boron silicate. Opaque and black in…
- Subject Precious stones, Minerals, Tourmaline
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Amazonite
- Undated
Amazonite is a potassium-based blue-green variety of microcline feldspar. Its color may be an indication of the presence of iron or lead. Amazonite has been used as a decorative gemstone in statues and jewelry.
- Subject Amazonite, Precious stones, Minerals
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Celestine
- Undated
Celestine is a mineral with a light blue color. It is a source of the element strontium (atomic symbol Sr). Strontium compounds are commonly used in fireworks, fluorescent lights, and dyes and paints.
- Subject Celestite, Precious stones, Minerals
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Beckman Model G Glass Electrode pH Meter
- Undated
Self contained pH meter with wooden exterior; hinged lid opens to reveal meter face and inlaid paper instructions for use; the dial is calibrated from pH 0 to pH 13 in .1 pH divisions; porcelain enamel lined electrode…
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2 items
Bausch & Lomb Spectroscope
- Undated
Spectroscope is in the style of the original Bunsen-Kirchhoff design. Triangular glass prism sits on a round, brass dias and is held in place by a metal arm attached to the dias; prism is coated in black paint with only…
- Manufacturer Bausch & Lomb Optical Company
- Subject Spectrometer, Bausch & Lomb Optical Company, Spectrum analysis, Spectroscope
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2 items