Search Results: Idiomorphic

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Euhedral and anhedral
Minggu, 2024-07-07 00:33:27

opposite properties in the formation of crystals. Euhedral (also known as idiomorphic or automorphic) crystals are those that are well-formed, with sharp,...

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Crystal habit
Senin, 2026-06-01 08:35:37

bounded by its characteristic faces, well-formed. Synonymous terms: idiomorphic, automorphic; Subhedral: a crystal partially bounded by its characteristic...

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Poikilitic texture
Rabu, 2025-10-15 23:59:55

later-formed less perfect crystals ('oikocrysts') surround smaller early-formed idiomorphic crystals ('chadacrysts') of other minerals. A poikilitic texture is most...

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Intrusive rock
Jumat, 2026-05-22 12:05:40

left between the already-formed crystals. The former case is said to be idiomorphic (or automorphic); the latter is xenomorphic. There are also many other...

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Enstatite
Selasa, 2026-01-06 01:35:38

plutonic rocks such as gabbro (norite) and diorite. It may form small idiomorphic phenocrysts and also groundmass grains in volcanic rocks such as basalt...

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Aqualite
Selasa, 2026-08-04 15:14:03

(approximated); Z = 3 Identification Color Pink (pale) Crystal habit idiomorphic crystals (max. 3 cm) Cleavage None Fracture Conchoidal Mohs scale hardness...

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Scapolite
Minggu, 2026-06-28 17:16:18

grains mingled with the other components of the rock. Large, nearly idiomorphic crystals are sometimes found in argillaceous rocks (altered calcareous...

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Gabrielite
Sabtu, 2026-01-03 23:34:49

polarized light). Gabrielite is a sulfosalt mineral species occurring as idiomorphic crystals commonly found in cavities of Triassic dolomite. The physical...

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Cave of La Pasiega
Minggu, 2026-07-19 00:02:55

fulfil their subsidiary function: on the other hand it is usual that the idiomorphic symbols appear in peripheral or marginal areas, or in those which are...

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Ora Caldera
Senin, 2026-07-20 09:20:52

with variable angles. Volcanic rocks show a porphyric structure with idiomorphic phenocrysts (1-4 mm) of feldspar and quartz that appears to have completely...

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Mount Zion Church Basalt
Rabu, 2026-05-06 21:26:05

high-titanium, normative tholeiitic basalt The main mineral phases are idiomorphic or sub-idiomorphic plagioclase and augitic clinopyroxene. During post eruption...

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Schreyerite
Sabtu, 2025-06-28 10:01:38

highly twinned unmixed grains in vanadium-bearing rutile that occurs as idiomorphic crystals in kornerupine-bearing quartz-biotite-sillimanite gneiss. It...

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Glossary of geology
Minggu, 2026-07-26 02:31:12

crystal faces peculiar to the species, used of minerals. Synonymous with idiomorphic. eustatic movements Changes of sea level, constant over wide areas, due...

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Leucitite
Minggu, 2025-06-08 18:01:45

both porphyritic and as an ingredient of the ground mass. It is always idiomorphic with rounded outlines. The feldspar ranges from bytownite to oligoclase...

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