Search Results
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2 items
Photograph of Otto Haas' office
- Undated
Sepia-toned photograph of Otto Haas' (1872-1960) office and Rohm and Haas.
The Rohm and Haas Company was founded in 1907 in Esslingen, Germany through the partnership of German chemist Otto Röhm and German businessman…
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Portrait of Otto Haas
- Undated
Black and white photograph of Otto Haas (1872-1960), cofounder of Rohm and Haas.
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2 items
Otto Haas leaving the Rohm and Haas office
- Undated
Black and white photograph of Otto Haas (1872-1960), co-founder of Rohm and Haas, leaving the office, located in Washington Square, Philadelphia, Pennsylvania.
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3 items
Photographs from the American Chemical Society, 1920s
This collection contains three photographs from 1924 to 1926 of the American Chemical Society.
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10 items
Rohm & Haas Penicillin Papers
This collection comprises of reports on the purification of penicillin using Amberlite Polymeric Resins by Rohm & Haas, dating from 1944 to 1945.
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12 items
Plastics Make It Possible
The Institute’s Plastics Make It Possible Collection documents a public relations campaign sponsored by the American Plastics Council, an industry trade association. The collection includes 12 magazine advertisements,…
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7 items
Stibnite
- Undated
Stibnite is a soft mineral form of antimony trisulfide (Sb₂S₃). Stibnite appears as needle-like crystals with a metallic lead-gray coloring. Stibnite is used to manufacture matches, fireworks, and percussion caps for…
- Subject Minerals, Sulfide minerals, Antimony
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3 items
Native Gold with Quartz
- Undated
Gold in its natural metallic form on a quartz matrix. While the chemical formula for gold is Au, native gold can also have impurities of silver and copper. In its pure form, gold is dense, soft, malleable, and colored…
- Subject Gold, Minerals, Quartz, Precious metals
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5 items
Indicolite (Blue) Tourmaline
- Undated
- Undated
This specimen contains indicolite tourmaline and lepidolite on an albite matrix. It was discovered in 2018 in the Galconda Mine in Brazil. The bright blue of the tourmaline is attributed to the presence of copper and…
- Subject Tourmaline, Minerals, Lepidolite, Albite, Crystals, Precious stones
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5 items
Erythrite
- Undated
Erythrite is a secondary mineral composed of hydrated cobalt arsenate, with the chemical formula Co₃(AsO₄)₂•8H₂O. It typically forms as a bright pink to crimson or purplish-red crystalline coating or radiating fibrous…
- Subject Minerals, Cobalt, Arsenate minerals
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4 items
Galena
- Undated
Galena is a natural mineral form of lead sulfide and has the chemical formula PbS. Galena's crystals commonly form in cubes, octahedrons, and their combinations. Less commonly, it can have dodecahedron crystal shapes.
…- Subject Galena, Lead sulfide, Minerals
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5 items
Polished Kunzite
- Undated
Kunzite (LiAlSi₂O₆) is one of the most well-known varieties of spodumene, a lithium aluminum silicate. Its coloring can range in hues of violet and pink, due to trace amounts of manganese. The coloring of the gemstone…
- Subject Minerals, Precious stones, Spodumene, Lithium
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5 items
Unpolished Kunzite
- Undated
Kunzite (LiAlSi₂O₆) is one of the most well-known varieties of Spodumene, a lithium aluminum silicate. Its coloring can range in hues of violet and pink, due to trace amounts of manganese. The color of the gemstone can…
- Subject Spodumene, Precious stones, Minerals, Lithium
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5 items
Aquamarine in Muscovite
- Undated
Aquamarine (Be₃Al₂(SiO₃)₆ or (Be₃Al₂Si₆O₁₈) is a variety of the beryl family and ranges from a pale blue to a light green. Aquamarine can appear greener depending on trace amounts of iron found in the crystal structure.…
- Subject Minerals, Muscovite, Mica, Silicate minerals, Precious stones
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5 items
Pink Apatite on Muscovite
- Undated
Apatite is a translucent gemstone that comes in an array of colors. This light pink apatite formed on Muscovite, an aluminum potassium mineral. Apatite has the chemical formula Ca₅(PO₄)₃(F, Cl, OH).
Muscovite is the…
- Subject Mica, Muscovite, Apatite, Minerals, Phosphate minerals
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5 items
Lepidolite
- Undated
Lepidolite is a lilac-gray or rose-colored member of the mica group of minerals, with the chemical formula K(Li,Al)₃(Al,Si)₄O₁₀(F,OH)₂. It is the most abundant lithium-bearing mineral and is a secondary source of this…
- Subject Minerals, Lithium, Alkali metals
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5 items
Ruby in Marble
- Undated
Rubies in marble, also referred to as marble-hosted rubies, are considered higher quality compared to rubies formed in basaltic rocks. This is because the low iron content in marble allows rubies to develop a more…
- Subject Rubies, Marble, Precious stones, Minerals
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4 items
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5 items
Purple Fluorite on Calcite
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Fluorite is a calcium fluoride with the chemical formula CaF₂ and crystallizes in the cubic system. Fluorite is allochromatic, meaning that it can be tinted with elemental impurities. It comes in a wide range of colors…
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6 items
Powellite
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Powellite is a calcium molybdate mineral with the chemical formula CaMoO₄. It occurs naturally in hydrothermal ore deposits and has a tetragonal crystal structure. Powellite fluoresces a bright yellow under short-wave…
- Subject Minerals, Crystals, Fluorescence
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4 items
Muonionalusta Meteorite
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The Muonionalusta meteorite is a meteorite classified as fine octahedrite, type IVA, which impacted Scandinavia about one million years ago. The meteorite was first discovered in 1906 in Sweden. It is thought to be the…
- Subject Meteorites, Iron, Titanium dioxide, Meteorites
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4 items
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6 items
Afghanite
- Undated
Afghanite is a hydrous sodium, calcium, potassium, sulfate, chloride, carbonate, alumino-silicate mineral. Its chemical formula is written as (Na, K)₂₂Ca₁₀(SO₂₄)₆Cl₆. It is a feldspathoid of the cancrinite group and…
- Subject Minerals, Crystals, Fluorescence
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4 items
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3 items
