Objects

Displaying 201 - 300 of 42096
Cat. # Name Description
201 00.2.10.0189 Pyrite Massive, tarnished.
202 00.2.10.145.0001 Calcite None
203 00.2.10.145.0002 Calcite None
204 00.2.10.145.0003 Calcite None
205 00.2.10.145.0004 Calcite Crystal.
206 00.2.10.145.0006 Calcite Crystals.
207 00.2.10.145.0011 Calcite Dogtooth spar.
208 00.2.10.146.0001 Calcite Crystals.
209 00.2.10.146.0002 Calcite None
210 00.2.10.146.0003 Calcite Crystals.
211 00.2.10.146.0007 Calcite Crystals.
212 00.2.10.146.0008 Calcite Book says 20 specimens, but 19 were deaccessioned.
213 00.2.10.146.0010 Calcite Crystals.
214 00.2.10.147.0003 Calcite Crystals. Catalog says that specimen was presented by S. H. Bishop.
215 00.2.10.147.0007 Calcite None
216 00.2.10.147.0008 Calcite Crystals with hematite crystals.
217 00.2.10.148.0004 Calcite None
218 00.2.10.148.0005 Calcite None
219 00.2.10.148.0008 Calcite Gummed label 1585; book says 11 specimens but 10 of the 11 were deaccessioned.
220 00.2.10.148.0009 Calcite None
221 00.2.10.148.0010 Calcite Rhombic spar.
222 00.2.10.148.0012 Calcite Crystals.
223 00.2.10.148.0013 Calcite Iceland spar.
224 00.2.10.149.0004 Calcite Crystals.
225 00.2.10.150.0002 Calcite Styolitic.
226 00.2.10.150.0003 Calcite With drusy surface.
227 00.2.10.150.0004 Calcite Limestone bearing calcite crystals.
228 00.2.10.150.0005 Gypsum Small seam of clear crystals.
229 00.2.10.150.0006 Calcite None
230 00.2.10.150.0007 Calcite None
231 00.2.10.150.0009 Calcite None
232 00.2.10.150.0010 Calcite Iridescent.
233 00.2.10.150.0013 Calcite Rhomb spar.
234 00.2.10.151.0001 Calcite None
235 00.2.10.151.0002 Calcite Satin spar.
236 00.2.10.151.0003 Calcite None
237 00.2.10.151.0006 Calcite Fibrous. Gummed label 239 3.
238 00.2.10.151.0007 Calcite Fibrous.
239 00.2.10.151.0010 Calcite Vein.
240 00.2.10.151.0011 Calcite Ferruginous.
241 00.2.10.152.0003 Calcite Limestone pockets bearing calcite crystals.
242 00.2.10.152.0008 Calcite Crystals in calcite geode.
243 00.2.10.153.0002 Calcite Geode.
244 00.2.10.153.0003 Calcite Geode.
245 00.2.10.153.0004 Calcite Geode.
246 00.2.10.153.0005 Calcite Geode.
247 00.2.10.153.0007 Calcite Pirolitic geode.
248 00.2.10.154.0001 Calcite Calcite crystals in coal.
249 00.2.10.154.0004 Calcite Bituminous shale matrix; lined with dog-tooth spar.
250 00.2.10.157.0003 Barite Calcite vein-stuff in carboniferous shale.
251 00.2.10.157.0004 Calcite Carboniferous shale bearing dog-tooth spar; Catalog says 3 specimens.
252 00.2.10.158.0001 Calcite Crystals in coal material.
253 00.2.10.158.0005 Calcite With curved calcite crystals.
254 00.2.10.159.0002 Calcite Crystals on carboniferous limestone.
255 00.2.10.159.0004 Calcite Drusy iridescent calcite crystals on black limestone.
256 00.2.10.160.0006 Calcite Crystals on limestone.
257 00.2.10.160.0010 Calcite Dog-tooth spar.
258 00.2.10.162.0002 Calcite Dogtooths spar on carboniferous limestone. Catalog says that this was deaccessioned in 6/93.
259 00.2.10.163.0003 Calcite Modified rhombic crystals.
260 00.2.10.163.0006 Millerite Sprays of crystals in large calcite crystals.
261 00.2.10.164.0005 Calcite Geode with pyrite crystals with 2 particles of bitumen.
262 00.2.10.165.0002 Calcite Pocket within calcareous tufa.
263 00.2.10.175.0002 Calcite From a seam of coal; Iron pyrite stain on one side.
264 00.2.10.177.0001 Calcite Crystal aggregate.
265 00.2.10.177.0002 Calcite Fragment of calcite geode lined with rhomboidal crystals of calcite.
266 00.2.10.177.0003 Calcite Cleavages.
267 00.2.10.177.0005 Calcite Limestone bearing calcite crystals.
268 00.2.10.177.0007 Calcite Carboniferous; Calcite crystals.
269 00.2.10.177.0008 Calcite Satin spar.
270 00.2.10.177.0009 Calcite Satin spar.
271 00.2.10.177.0011 Calcite None
272 00.2.10.177.0012 Talc None
273 00.2.10.177.0015 Gypsum Translucent, blocky crystal group.
274 00.2.10.187.0002 Marble Smoky
275 00.2.10.189.0003 Barite Pinkish blades on dark calcite matrix with clear calcites.
276 00.2.10.189.0004 Calcite Crystals.
277 00.2.10.189.0005 Calcite Crystals.
278 00.2.10.189.0007 Marcasite None
279 00.2.10.189.0008 Galena Galena with quartz crystals.
280 00.2.10.562.0012 Columbite (Tantalite group) This number has not been assigned a location in the catalog (number not found in catalog).
281 00.2.11.0011 Goethite Color: BK
282 00.2.11.11.0011 Goethite Dull, stalactitic. Color: BK
283 00.2.11.243.0004 Quartz Granitoid quartz and mica.
284 00.2.11.250.0004 Marcasite Marcasite & calcite crystals in small vug.
285 00.2.11.253.0001 Calcite Very large and heavy; crystalline.
286 00.2.11.254.0005 Quartz Quartz porphyry, var. Microgranite.
287 00.2.11.262.0005 Talc Talc schist.
288 00.2.11.264.0001 Hematite Crystals, 1/2" - 1/4", on matrix (after magnetite). Color: BK
289 00.2.11.264.0003 Carnotite Yellow coating.
290 00.2.11.264.0004 Perthite (Feldspar group) Pethite, a microcline - albite - perthite. Also monoclinic.
291 00.2.11.264.0005 Chrysocolla Massive. Color: GR
292 00.2.11.264.0008 Stannite Small, dark gray crystals.
293 00.2.11.264.0009 Stannite Massive dark gray rock (broken in half).
294 00.2.11.268.0012 Calcite Fragment of geode. This number not found in the catalog.
295 00.2.11.283.0001 Heubnerite Crystals in quartz.
296 00.2.11.283.0005 Jamesonite Gray, fibrous; other piece - shiny, brown (looks like road tar)
297 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.
298 00.2.13.0505 Copper Not found in catalog.
299 00.2.13.500.0006 Pyrite Pyrite in black tourmaline.
300 00.2.13.500.0008 Calcite With iron disseminated, decomposed marcasite present
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