I'm not positive but I think they may be the same thing-moqui, boji. I have a rather large rock(s) that someone told me years ago was a conjoined boji. This was at a rock store in Ann Arbor, MI. 'They' are around 8 lbs, a bit smaller than a football & very large for the typical boji, but that's what he said. I just knew it was something, it was so very odd. The small one grew like a distinctive knob on top of the large one & it's about 3" in diameter. I took a pic of 'them' last nite with my new fone but I can't figure out how to transfer it to my computer; can't find the cable. I'd like shelikkes2read to look at it. I'll figure it out, hopefully. When I lived in Michigan, evidently a long ago previous owner was a rockhound I found out, when he died his wife threw away & buried his whole collection, & when I dug in to make herb/flower beds, I kept coming up with all kinds of really cool stuff-quartz crystals, huge & small geodes, copper clusters still in crystalline form, obsidian, a big hunk of raw emerald (not good enough quality to be faceted, but still), opal (YES!), lots of others. Things that just aren't to be found in MI, except for the copper and many many petoskey stones. I would love to have one slabbed & polished...they're just adorning my gardens. The more I found, the more I had to dig...& I brought much of it with me to Ohio when I moved back. I spent weeks digging & cleaning. I gave a 40 lb calcite crystal slab to my horse's vet, he admired it so. My brother was president of the Akron lapidary club at the time; he was perplexed. Didn't truly believe me till he visited from South Carolina. I got lotsa poison ivy during that period also...