Sphalerite, also known as zinc blende and ruby jack, is an ore of zinc. Sphalerite is soft, is not suitable for jewellery and is Stock Photo - Alamy
SS Rocks - Galena Crystals on "Ruby Jack" Sphalerite (Pitcher, Oklahoma) 49g | #1795319664
Super Shiny Metallic Ruby Jack Sphalerite From Rosiclare | Etsy
Ruby Jack Sphalerite and Cubic Galena on Limestone Matrix | Etsy
Sphalerite with Chalcopyrite and Ruby-jack Sphalerite ~ Ballard Mine, Baxter Springs, Picher Field… | Gems and minerals, Rocks and minerals, Rock minerals