A small specimen with excellent proustite crystals on it. It is easy to see why proustite is a member of the group of minerals called "ruby silver"! Considering they are composed of silver, arsenic and sulphur, the result of the composition is a deep red colour reminiscent of the finest rubies! There are also some nice, small, orange xanthoconite crystals with the proustite. The photo I did is poor but the crystals are excellent. You can do it! Nice example!