Now the weirdest mix so far is Malachite mixed with the dark metallic metal which is Chalcocite, copper(I) sulfide (Cu2S), is an important copper ore mineral. It is opaque, being colored dark-gray to black with a metallic luster. In it's pure version it has a hardness of 2½ - 3. In this Quartz mix it is 5 - 6 on the MOHS scale! Since chalcocite is a secondary mineral that forms from the alteration of other minerals, it has been known to form pseudomorphs of many different minerals. A pseudomorph is a mineral that has replaced another mineral atom by atom, but it leaves the original mineral's crystal shape intact.
The bright mettalic look is only from one angle. In other angles it looks to be a really dark green or blue green to my eyes. I have never ever seen this before so it is a new stone for me. I suspect it is a very rare mix. These 3 sets are all I have been able to get so far and I only have two green pieces left to cut.
I have one more Malachite piece already slabbed that I will probalby get to cutting into preforms soon. It is a kind of fern or feather looking spray in mostly white Quartz and again is something I have never seen before. I am having to use Hxtal on some of these "sprays" as they are not fully silicated.