ransomite

{{Infobox mineral | name = Ransomite | category = Sulfate | image = Ransomite.jpg | caption = | formula = CuFe2(SO4)4·6H2O | IMAsymbol = | molweight = 667.59 | strunz = | system = Monoclinic | class = 2/m - Prismatic | symmetry = P21/m | unit cell = a = 4.811 Å, b = 16.217 Å c = 10.403 Å; β= 93.01°; Z = 2 | color = Bright sky blue; pale blue in transmitted light | habit = needle-like crystals | twinning = | cleavage = Perfect along {010} | fracture = | tenacity = Radiating tufts and crusts | mohs = 2.5 | luster = Vitreous, pearly cleavage | polish = | refractive = nα= 1.631 nβ= 1.643 nγ= 1.695 | opticalprop = Biaxial positive | birefringence = δ = 0.064 | dispersion = v > r strong | pleochroism = | fluorescence= | absorption = | streak = | gravity = | density = 2.632 g/cm3 | melt = | fusibility = | diagnostic = | solubility = | diaphaneity = Transparent | other = | references = }}

Ransomite is a sulfate mineral first discovered at the United Verde mine in Jerome Arizona. This mineral was formed as a result of a mine fire. The United Verde mine is one of few places in the world where Ransomite can be found. This mineral can be described as a soluble sulfate that forms needle-like crystals and has a pale blue color in transmitted light. This mineral was named by Carl B. Lausen as a tribute to Frederick Leslie Ransome. Ransome was an American mining geologist who worked at the California Institute of Technology, the University of Arizona and the United states Geological Survey.