chrome diopside and quartz are two different gemstones. Chrome diopside is sometime found along with quartz and hence the name.
Most reports of chrome diopside are found in Libby, Montana. Though there have been reports of finding these kinds of diopside in Canada, South Africa, Russia and Brazil.
Rarity is relative, and debateable. I think it's safe to say that diopside is not considered to be a rare mineral, though large, transparent green well-formed crystals of diopside are indeed rare, as are fine, large and clean faceted stones.
"Violane", the manganese rich violet to blue variety of diopside, is quite uncommon, found in Italy, Greece, and California, according to mindat.org.
chrome diopside
Examples: ruby, emerald, diopside, tourmaline.
The Russian Empire made the Byzantine Eagle.The Russian Empire made the Byzantine Eagle.
Russian made watches are expensive locally because they are in demand because of the craftsmanship and the look of Russian made watches. Most Russian watches are good quality, well made, mechanical, and a good value.
Garnet, Almandine, Grossular, Andradite, Uvarovite, Diopside, Melanite, and Spessartine.
They were made in 998 AD
Pyroxenite is an ultramafic igneous rock consisting essentially of minerals of the pyroxene group, such as augite and diopside
Russian dish made fom beef