the.com/selenite

a crystal named for the moon that dissolves quietly in the rain it pretends to outlast

means A translucent, glassy variety of gypsum that forms in clear crystals or sheets, soft enough to scratch with a fingernail and prone to dissolving in water.

from From the Greek selēnitēs lithos, "moonstone" or "stone of the moon," built on Selēnē, the moon goddess — named for the pale, moonlit sheen of its crystal faces. The same goddess lends her name to the element selenium, her sister metal.

moon namesake
Named for Selene, Greek goddess of the moon
water-soluble
Dissolves in water despite looking eternally solid
soft mineral
Scratchable with a fingernail, ranking 2 on Mohs
giant crystals
Mexico's Naica cave holds 36-foot selenite beams
actually gypsum
Just crystallized gypsum, same stuff as drywall
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