A study of the chemistry, structure, and physical properties of minerals.
Mineralogy
Displaying 1801 - 1900 of 2805
| Cat. # | Name | Description | ||
|---|---|---|---|---|
| 1801 | 00.2.6.198.0014 | Gypsum | White, massive, pieces of a 3/4" slab, unpolished var. alabaster |
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| 1802 | 1990.53.0047 | Sphalerite | "Ruby" crystals with chalcopyrite crystals. |
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| 1803 | 00.2.4.10.0006 | Copper | Native copper. |
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| 1804 | 00.2.10.164.0005 | Calcite | Geode with pyrite crystals with 2 particles of bitumen. |
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| 1805 | 00.2.9.66.0013 | Epidote | None |
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| 1806 | 1995.1.0006 | Quartz | Both chalcedony & agate (banded) varieties of quartz with small vug of crystals (rusty). Color: TN,WH,OR |
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| 1807 | 1970.47.1.0227 | Galena | None |
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| 1808 | 00.2.6.239.0008 | Barite | Red brown crystals. |
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| 1809 | 1990.53.0170 | Turquoise | Tumbled and polished; massive. |
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| 1810 | 2006.15.0014 | Malachite | Medium in size malachite specimen, 2 polished faces, stone with bands of emerald and light mint green with bands of translucent chalcedony within, dull to silky luster, 3.5-4 on hardness scale. Secondary copper mineral Color: Green |
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| 1811 | 00.2.9.83.0009 | Chalcopyrite | Massive, with pyrite, galena & quartz. |
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| 1812 | 00.2.5.105.0011 | Quartz | Smoky quartz. |
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| 1813 | 00.2.23.705.0012 | Nickeline | Massive. Color: YL |
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| 1814 | 1987.3.0113 | Quartz, var. opal | In matrix. |
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| 1815 | 00.2.3.674.0001 | Labradorite (Feldspar group) | None |
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| 1816 | 1990.53.0269 | Jadeite | None |
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| 1817 | 00.2.10.0161 | Calcite | Dog tooth spar on carboniferous limestone. Catalog says that this was deaccessioned in 6/93. |
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| 1818 | 00.2.9.55.0008 | Magnetite | Massive. Color: BK |
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| 1819 | 1990.53.0359 | Wulfenite | Square, blocky orange crystals to 3/8" coated with vanadinite crystals to 1/16" |
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| 1820 | 00.2.4.24.0012 | Chalcopyrite | Massive, with pyrite & quartz. |
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| 1821 | 2006.15.0130 | Pineapple Calcite | Medium in size section of limestone with calcite crystal formation, (developing, brown color) and a small cluster of crystals called "Pineapple" calcite, dull resinuous luster, 3 on hardness scale, calcium carbonate Color: Gray |
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| 1822 | 00.2.6.196.0003 | Barite | White, lamellar. |
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| 1823 | 00.2.3.657.0005 | Chalcocite | Dark brown massive. |
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| 1824 | 00.2.6.203.0012 | Cerussite | None |
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| 1825 | 1990.53.0092 | Hemimorphite | None |
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| 1826 | 1970.47.1.0377 | Chalcopyrite | Four chalco crystals on dolomite crystals. |
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| 1827 | 00.2.4.16.0002 | Galena | Individual crystals. Color: GY |
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| 1828 | 00.2.9.69.0004 | Pyrite | Pyrite and pink feldspar. Color: PK |
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| 1829 | 1995.36.0027 | Gypsum | Var. selenite, with curved crystals. Color: WH |
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| 1830 | 00.2.4.40.0006 | Halite | Isometric; 1 tube, numerous specimens, approx. 20+. |
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| 1831 | 00.2.9.50.0008 | Hematite | Massive. Color: BK |
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| 1832 | 1990.53.0204 | Quartz | None |
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| 1833 | 2006.15.0056 | Quartz, rock crystal | Small in size singular rock crystal, colorless, near perfect cleavage, vitreous luster, 7 on hardness scale Color: Colorless |
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| 1834 | 00.2.3.640.0003 | Bismuth | Rhombohedral. |
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| 1835 | 1990.53.0016 | Microcline (Feldspar group) | None |
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| 1836 | 00.2.3.685.0002 | Calcite | Small crystals (scalenohedral) coating and throughout specimen. Color: GD |
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| 1837 | 00.2.10.150.0010 | Calcite | Iridescent. |
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| 1838 | 00.2.9.62.0008 | Kyanite | Crystal pieces. Color: BL |
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| 1839 | 1994.11.0005 | Fluorite | Vug lined with calcite then 1/8" fluorite cubes. Color: BR,GD |
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| 1840 | 00.2.4.30.0003 | Pyrite | One specimen has cubes of pyrite to 3/8" on quartz crystals. Other, massive pyrite in matrix. a. and b. |
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| 1841 | 1970.47.1.0151 | Calcite | None |
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| 1842 | 00.2.3.661.0009 | Arsenopyrite | Gold, metallic crystals on massive; (color & disintegration more like marcasite FeS2); 1 M & 1 bottle of fragments (disintegrated) |
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| 1843 | 00.2.6.229.0001 | Gypsum | White intergrown crystal mass. |
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| 1844 | 1990.53.0125 | Cuprite | Var. chalcatrichite, acicular (in perky box). Color: RD |
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| 1845 | 1970.47.4.0036 | Quartz, geode | None |
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| 1846 | 00.2.15.299.0003 | Marcasite | Nodule. |
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| 1847 | 1995.36.0057 | Augite (Pyroxene group) | Indistinct crystals forming almost solid aggregate. Color: BK |
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| 1848 | 00.2.9.74.0001 | Hematite | Massive, shiny. Color: GY |
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| 1849 | 00.2.4.43.0001 | Halite | Excellent. |
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| 1850 | 00.2.5.101.0005 | Quartz | Crystal. |
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| 1851 | 1986.16.65.0002 | Quartz | Keswick crystals. |
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| 1852 | 00.2.3.668.0004 | Phlogopite | Thick plate. Color: BR, CL |
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| 1853 | 1990.53.0237 | Sphalerite | None |
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| 1854 | 1990.53.0323 | Quartz, geode | None |
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| 1855 | 2006.15.0098 | Galena | Small rock, lead sulfide, heavy somewhat abbrassive texture, metallic or submetallic luster, 2.5-3 on hardness scale, steel gray or metallic powder blue color, greatest ore of lead Color: Gray |
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| 1856 | 11.11.11.0407 | Calcite | Crystal group; color from addition of cobalt. Color: PK-PR |
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| 1857 | 00.2.5.97.0002 | Quartz | One large and one small. |
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| 1858 | 1986.16.54.0007 | Tourmaline group | None |
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| 1859 | 00.2.3.646.0007 | Galena | Cubic cast coated with dolomite crystals containing cubo-octahedral crystals. Color: GY |
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| 1860 | 00.2.6.199.0001 | Gypsum | Ver. selenite; clear with cleavage. |
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| 1861 | 1990.53.0050 | Celestite | Small 1" x 1 1/2" vug in gray limestone lined with blue celestite crystals to 3/8" (Nice!) |
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| 1862 | 00.2.4.10.0007 | Copper | Native copper Gummed label:1019. |
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| 1863 | 00.2.10.165.0002 | Calcite | Pocket within calcareous tufa. |
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| 1864 | 00.2.9.66.0015 | Beryl | None |
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| 1865 | 1995.1.0007 | Quartz | Quartz crystal lined vugs in chalcedony. Color: CL |
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| 1866 | 00.2.4.34.0003 | Pyrite | Drusy pyrite on matrix. |
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| 1867 | 1970.47.1.0241 | Galena | None |
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| 1868 | 00.2.6.239.0009 | Barite | Massive, white. |
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| 1869 | 1990.53.0171 | Turquoise | None |
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| 1870 | 2006.15.0015 | Malachite | Small in size malachite specimen, bright mint and emerald green colour, bands of malachite atop one another, dull to silky luster, 3.5-4 on hardness scale Color: Green |
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| 1871 | 00.2.23.705.0019 | Muscovite | Microcrystalline. Color: YL |
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| 1872 | 1987.3.0119 | Chrysocolla | None |
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| 1873 | 00.2.3.674.0003 | Chrysotile | None |
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| 1874 | 1990.53.0270 | Rhodochrosite | Pink rhodochrosite crystals on quartz crystal matrix, crystal sizes 1/4" Color: WH, PK |
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| 1875 | 00.2.10.0163 | Calcite | Geode and limestone. |
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| 1876 | 00.2.9.55.0009 | Hematite | Massive. Color: BK |
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| 1877 | 1990.53.0360 | Quartz | None |
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| 1878 | 00.2.4.25.0007 | Sphalerite | Hand: massive intermixed with chert . Miniature: sphalerite crystals on quartz crystals |
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| 1879 | 2006.15.0131 | Calcite | Small in size specimen of limestone with calcite 9dog-tooth spar) inside (calcite "geode") with traces of pyrite (bronze) on crystals, dull to vitreous luster, 3 on hardness scale, various colors, calcium carbonate Color: Colorless |
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| 1880 | 00.2.6.196.0004 | Barite | Crystalline massive. |
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| 1881 | 00.2.3.657.0006 | Stibnite | Steel gray massive. |
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| 1882 | 00.2.6.203.0013 | Apatite group | None |
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| 1883 | 00.2.10.148.0010 | Calcite | Rhombic spar. |
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| 1884 | 00.2.10.148.0012 | Calcite | Crystals. |
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| 1885 | 00.2.10.148.0013 | Calcite | Iceland spar. |
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| 1886 | 00.2.10.154.0005 | Unk | None |
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| 1887 | 00.2.10.154.0006 | Unk | None |
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| 1888 | 00.2.11.268.12 | Calcite | Fragment of geode. This number not found in the catalog. |
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| 1889 | 00.2.11.283.0001 | Heubnerite | Crystals in quartz. |
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| 1890 | 00.2.11.283.0005 | Jamesonite | Gray, fibrous; other piece - shiny, brown (looks like road tar) |
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| 1891 | 00.2.11.283.0006 | Melanterite | Melanterite is one of only a few water soluble sulfate minerals. It forms in the near-surface secondary oxidation zone of ore deposits usually late in their development. In many mines, melanterite is an ongoing precipitate or efflorescent forming white to green encrustations, crystal aggregates and stalactites right on the sides of the mine's shafts. The primary source of the iron for melanterite is iron sulfides such as pyrite, pyrrhotite, marcasite and chalcopyrite. A technique for removing copper from the copper sulfate mineral chalcanthite is responsible for the naming of an alternate name for melanterite. Chalcanthite, like melanterite, is soluble in water and it thus makes a solution of copper sulfate. If metallic iron is added to the solution, then metallic copper precipitates, leaving a solution of iron sulfate. This left-over solution has the same composition as a solution made from dissolving melanterite. The alternate name for melanterite is "copperas", from the Greek meaning "copper water", an allusion to the left-over solution. In a way, this could be thought of as "copper-providing water". Attractive crystals of melanterite with a beautiful blue-green color are know to exist and are sought after. The shades toward blue come from impurities of copper which can substitute for as much as one third of the iron. The more copper, the bluer the crystals. Generally melanterite is known as having a white or green color. Melanterite is also the name of a group of only five monoclinic sulfates of which melanterite is the only somewhat common member. Members of this group have the same basic structure as melanterite, but can have in place of iron, ions of manganese, zinc, cobalt and copper. These are the members of the Melanterite Group: Bieberite (Hydrated Cobalt Sulfate), Boothite (Hydrated Copper Sulfate), Mallardite (Hydrated Manganese Sulfate), Melanterite (Hydrated Iron Sulfate), Zinc-melanterite (Hydrated Zinc Copper Iron Sulfate) PHYSICAL CHARACTERISTICS: Color is white, green, yellowish green or blue-green. Luster is vitreous to silky. Transparency: Crystals are translucent to slightly transparent. Crystal Habits include stubby prismatic or blocky to tabular crystals, sometimes as pseudo-octahedrons. Also acicular, fibrous and capillary and found as encrusting, stalactitic and concretionary masses. Cleavage is perfect in one direct but only distinct in another. Fracture is conchoidal. Hardness is 2 Specific Gravity is approximately 1.9 (well below average). Streak is white. Other Characteristics: Is soluble in water and may deteriorate with absorption of water. The taste has a sweet, astringent and metallic character. Associated Minerals are epsomite, chalcanthite, gypsum, pyrite, pyrrhotite, marcasite and chalcopyrite. Notable Occurrences include Minas de Rio Tinto, Spain; Rammelsberg, Harz Mountains, Germany and Falun, Sweden; and in the United States at Ducktown, Tennessee; South Dakota; Colorado; Bigham Canyon, Utah; Comstock Lode, Lincoln County, Nevada; Butte, Montana; at several mines in Arizona and at The Geysers in Sonoma County and at Leona Heights, Alameda County, California. Best Field Indicators are crystal habit, low density, associations, solubility in water, taste and color. |
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| 1892 | 00.2.13.500.0012 | Unk | None |
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| 1893 | 00.2.14.697.0020 | Quartz, geode | Quartz geode lined with botryoidal chaldedony. |
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| 1894 | 00.2.14.697.0022 | Calcite | Grotesque argillo calcareous concretion. |
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| 1895 | 00.2.14.697.0023 | Calcite | Argillo-calcareous concretions. |
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| 1896 | 00.2.14.697.0024 | Limonite | One-half large concretion. Color: BR |
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| 1897 | 00.2.14.697.0027 | Hematite | Variety martite; shows octahedrons clearly. Color: BR |
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| 1898 | 00.2.15.294.0003 | Calcite | Concretions; "From a layer just above ferrous sand running into blue Kansanan Clay, and west up into Iowa ten or more feet above it. Now a line of gravel which I had considered B. G. After a while this calcareous matter moves out and underated layers of for. sand takes its place." |
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| 1899 | 00.2.15.304.0001 | Calcite | Concretion about a root |
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| 1900 | 00.2.15.304.0003 | Calcite | Vein, in coal. |
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