Luster of Sphalerite
Luster will vary just a little.
It can be a resinous luster all the way to a greasy luster. Some Sphalerite's even have an adamantine luster to it. So overall the luster can vary from a resinous luster to a adamantine luster. A resinous luster is a luster that includes a lot of resin in it or appears to do so. An adamantine luster is a type of luster that appears to have a superlative look about it. This is because the base term, adamantine, means unbreakable.
Many people also include that these minerals are often opaque but can be translucent or transparent or anywhere in between.
Many people also include that these minerals are often opaque but can be translucent or transparent or anywhere in between.