The first instance I got solo on my paladin today..... Occulus >.<

We ran through without issue, the sack of gems is lootable for each toon, so make sure you don't leave a toon's sack in the chest (lol). Mine had 2x www.wowhead.com/?item=Scarlet Ruby but it's probably random. I also got 2x extra www.wowhead.com/?item=emblem of triumph