A rare mineral that contains iron, sulfur, and water and often appears in rust-colored crusts on rocks.
From Greek botryos (bunch of grapes) + -gen (to produce, generate). Named because the mineral often crystallizes in grape-like clusters or grape-bunch formations.
This mineral literally has 'grape-maker' in its name because when the right chemistry happens in nature, iron sulfates naturally want to grow into clustered bunches—it's like crystals are following an ancient blueprint written in geology.
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