Dims: 2.5" x 2.125" x 1.5" (6.6 x 5 x 3.9 cm)
Wt: 4.92 oz(139.5 g.)
Uruchacua Mine, Ancash, Peru
Though only a small portion of this specimen's mass is made up of Rhodocrosite, the form of the crystals contributes most to it. There are a total of 8 complete and 5 incomplete but discernable crystals on a black mananese oxide bed that lays on the host rock. Only one of these complete crystals is larger than 1/4"(0.5 cm), and its by far the most impressive of the lot! It measures approximately 9/16"(1.5 cm), and is in the form of a scalenohedral end-to-end contact twin that has near-perfect form! One termination of one crystal is buried in the base of an incomplete dogtooth that has been cloven off an estimated 1/3 to 1/2 up its length, but the rest of it is complete with no damage. There are some barely visible striations along a few of the main faces and the entire twin has a waxy luster that interferes with the crystal's partial transparency. There are veil-like inclusions surrounding the twinning plane, but each crystal clears approaching its termination. The other crystals are much smaller and paler than the largest one, and seem to be coated with some substance that gives them almost a satiny luster. When Doris showed this specimen to me, I said,"We have to take this one!"