McDermitt Mine, Opalite District, Humboldt Co., Nevada, USA

(Hg₂N)(Cl,SO₄)·nH₂O and (Hg⁺₂)₃Cl₃O(OH)

The Kleinite can found as small yellow orange rounded crystals and botryoidal masses. When exposed to light, it darkens to an orange/brown color and then reverts back when kept in the dark. Eglestonite darkens more and more with exposure to light. On this specimen, the Eglestonite is mostly a dark brown. There is also white Opal which fluoresces bright green under SW UV.

9 x 5.2 x 5.8 cm

$40      Click here to order this mineral.