Millerite Value, Price, and Jewelry Information
“Millerite,” flexible and soft to the touch, 2.8 x 3.5 x 1.5 cm, Halls Gap, Lincoln Co., Kentucky, USA. © Rob Lavinsky, http://www.iRocks.com. Used with permission.
Millerite has a rich, attractive yellow color. Massive millerites can sometimes be cut into cabochons but are too soft for jewelry use. However, millerite crystals can also have a striking, hair-like appearance. ...
https://www.gemsociety.org/article/mill ... formation/