There’s also a fully searchable index covering the complete thin section set, listing for each sample its locality, the anticipated major minerals, a brief generalized geologic environment description, and where appropriate, the nature of any unusual element enrichments.
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sample: FKM-451
locality: Mpita prospect, Kimbedi, Mindouli, Republic of Congo.
rock type: test.
major mineralogy: The specimen was acquired for dioptase.
sample: FKM-452
locality: Přibyslavice, Kutná Hora, Bohemia, Czech Republic.
rock type: B- and P-bearing granite.
major mineralogy: The specimen was acquired for sarcopside and graftonite.
sample: FKM-453
locality: Khibiny massif, Kola Peninsula, Murmanskaja Oblast’, Russia.
rock type: test.
major mineralogy: specimen acquired for nenadkevichite.
sample: FKM-454
locality: Toyofuku, Uki City, Kyushu Is., Japan.
rock type: plumasite “dike” in metasomatized (biotite-cordierite) peridotite.
major mineralogy: specimen acquired for corundum, hercynite, and oligoclase.
sample: FKM-455
locality: Gilba valley, Brossasco, Piedmont, Italy (part of the Dora Maira massif).
rock type: whiteschist.
major mineralogy: specimen acquired for magnesiostaurolite.
sample: FKM-456
locality: Bordvedåga (Høgtuva beryllium deposit), Høgtuva, Rana, Nordland, Norway.
rock type: add rock type.
major mineralogy: specimen acquired for phenakite, biotite and microcline.
sample: FKM-457
locality: Bastnäs, Riddarhyttan, Skinnskatteberg, Västmanland, Sweden.
rock type: best described as a REE metasomatite.
major mineralogy: The specimen was acquired for ferriperboeite-(Ce), ferri-allanite-(Ce), cerite-(Ce), actinolite and quartz.
sample: FKM-458
locality: Stary Gierałtów, Gmina Stronie Śląskie, Kłodzko County, Lower Silesian Voivodeship, Poland.
rock type: test.
major mineralogy: The specimen was acquired for kumdykolite in almandine
sample: FKM-459 (billet from Univ. Arizona petrology collection; sample 12-8-65-1)
locality: Bearpaw Mountains, Hill Co., MT, USA. Based on rock descriptions in Bayley (1897), the sample could be more specifically from Bearpaw Peak, the highest point in the range.
rock type: leucitite; compare to sample FKM-460 (leucitite), also from the [the same locality].
major mineralogy: The specimen was acquired for leucite.
sample: FKM-460 (billet from Univ. Arizona petrology collection; sample 12-8-65-3)
locality: Bearpaw Mountains, Hill Co., MT, USA. Based on rock descriptions in Bayley (1897), the sample could be more specifically from Bearpaw Peak, the highest point in the range.
rock type: leucitite; compare to sample FKM-459 (leucitite), also from the [the same locality].
major mineralogy: The specimen was acquired for leucite.
sample: FKM-461 (billet from Univ. Arizona petrology collection; sample 100:1)
locality: Limburg-Weilburg, Giessen Region, Hesse, Germany.
rock type: limburgite porphyry.
major mineralogy: The specimen was acquired for augite, olivine and zeolites (philipsite?) filling amygdules.
sample: FKM-462
locality: The simple mineralogy of this specimen is very similar to that of sample FKM-68, which is reportedly from the Longido area, Mt. Kilimanjaro region, Tanzania. Note: both of these presumed “Longido” specimens were purchased from lapidary suppliers and not a mineral dealer perhaps more accustomed to collectors’ desire of precise locality data. While FKM-68 was specifically labeled as from Longido, this cabochon was only labeled as being from “Tanzania”. As with sample FKM-68, it is in fact possible this sample actually does come from the more well-known nearby Mundarara mine locality.
rock type: corundum-zoisite-pargasite gneiss. Presumably a higher pressure (eclogite facies) equivalent of corundum-bearing amphibolite (i.e., akin to sample FKM-24); estimated at between 700°-850° C and between ~10-20 kbars, according to experimental phase relations. Note that unlike FKM-24, the amphibole in this sample is actually pargasite rather than tschermakite. Both this sample and FKM-24 (as well as FKM-68 and FKM-290) are thus granulite to eclogite facies metamorphic equivalents of what were probably originally gabbro to gabbroic anorthosite.
major mineralogy: The specimen was acquired for corundum, zoisite and pargasite.
sample: FKM-463
locality: reportedly comes from “northwest Pakistan”; given its commercial name of “Khyber stone”, the locality can perhaps be slightly narrowed down to Pakistan’s Khyber Pakhtunkhwa province?
rock type: this is apparently a relatively new lapidary material from “northwest Pakistan”. Fashioned as cabochons, carvings and obelisks (but not yet observed as rough), it’s been variously sold as “snowflake obsidian” (not even close!), as “rhodonite” (due to the large very pale pink crystals in the dark matrix… also not correct), and a “porphyrite”, although the rock, while possibly originally igneous, now appears to be metamorphic.
major mineralogy: The specimen was acquired for “hornblende”.
sample: FKM-464 (billet from Univ. Arizona petrology collection; the original sample was collected by Mark Barton during a field trip to the area, in conjunction with the 1994 GSA Annual Meeting in Seattle)
locality: Mount Baker area, WA, USA. Unfortunately, there are several outcrops of differing quartz diorite in the area, and it’s not known from which more specific locality this sample was collected.
rock type: two pyroxene quartz diorite.
major mineralogy: The specimen was acquired for plagioclase, clinopyroxene, orthopyroxene, hornblende, biotite and quartz.
sample: FKM-465 (billet from Univ. Arizona petrology collection; sample 8-27-60-18)
locality: Comobabi Mountains, Pima Co., AZ, USA.
rock type: hydrothermally-altered low-grade (prehnite-pumpellyite facies?) basalt.
major mineralogy: The specimen was acquired for epidote and pumpellyite.
sample: FKM-466
locality: test.
rock type: test.
major mineralogy: test.
sample: FKM-467
locality: test.
rock type: test.
major mineralogy: test.
sample: FKM-468
locality: test.
rock type: test.
major mineralogy: test.
sample: FKM-469
locality: test.
rock type: test.
major mineralogy: test.
sample: FKM-470
locality: test.
rock type: test.
major mineralogy: test.
sample: FKM-471
locality: test.
rock type: test.
major mineralogy: test.
sample: FKM-472
locality: test.
rock type: test.
major mineralogy: test.
sample: FKM-473
locality: test.
rock type: test.
major mineralogy: test.
sample: FKM-474
locality: test.
rock type: test.
major mineralogy: test.
sample: FKM-475
locality: test.
rock type: test.
major mineralogy: test.