Opal's luster can be found anywhere on a range from dull to vitreous.
a metalic type of luster
it's graphite!!
The luster is Glassy.
luster is i do not know
Vitreous luster
Apophyllite shows Vitreous and Pearly luster.
luster: Vitreous/ non-metallic streak: white. if you crush ruby, it will turn into white dust
a vitreous luster (eg. diamond [C] or rutile [TiO2])
the type of luster which is dull
No. Peridot is olivine.
Halite has a non-metallic luster! Hope it answers ur question ;)