Formula: MgFe³⁺(SO₄)₂(OH) · 7H₂O

Species:

Colour: Light to dark orange-red; pale to dark orange

Lustre: Vitreous

Hardness: 2 – 2½

Specific Gravity: 2.14

Crystal System: Monoclinic

Name: From the Greek βότρυς = “bunch of grapes” and γεννάν = “to bear”, in allusion to the appearance of the original botryoidal and stalactitic masses found at Falun, Sweden.

Type Locality:  Falun mine, Falun, Dalarna County – Sweden

Chemically similar to magnesiocopiapite, mountkeithite, and slavíkite.Decomposes in hot water.