Imogolite : Al2SiO3(OH)4
Mindat locality:
Photo added to mindat.org
“Brown, "ugly" imogolite from Uemura, Shimotashiro-maci, Hitoyoshi-shi, Kumamoto Prefecture, Japan. This mineral belongs to the least popular mineral group among collectors: The clay minerals. My catalog number 9302. FOV 3.4 mm. Collection and photo OT. Ljøstad”
OT. Ljøstad - 6th November 2019
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