Diopside from Niigata Prefecture, Japan
Japan | |
| www.city.itoigawa.niigata.jp/fmm/detail-menu2/min109-corundum/corundum.html (in matrix of corundum-bearing river cobbles) |
| Petrov, Alfredo (n.d.) Personal Communication. |
Japan | |
| www.city.itoigawa.niigata.jp/fmm/detail-menu2/min109-corundum/corundum.html (in matrix of corundum-bearing river cobbles) |
| Petrov, Alfredo (n.d.) Personal Communication. |