Gypsum outcrop, Galera, Granada, Andalusia, Spain
Cabinet - 10.1 x 5.4 x 3.8 cm
97 grams
Specimen status: Reserved
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Menilite nodules to 2.2 cm embedded in
a cleaved gypsum matrix. Mindat describes menilite as
"opaline concretions found in marls, gypsums and shales.
Sometimes considered a variety of opal but probably impure
and really just young flint nodules which haven't
recrystallized [into] quartz yet; thus really a rock
rather than a mineral." A mineralogical oddity.
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