by partgypsy » Jun 25, 2009 You guys (in colored stone forum) are so bad. I was trying to refrain from gem buying, but ended up on ebay bidding on a bunch of gemstones and in 2 different auctions winning two "demantoid garnet". The first I received and am pretty sure it is demantoid. The second one I just won, will take a couple weeks to arrive. But I have some concerns. It is advertised as new find - Madagascar demantoid. I know sphenes which also can have the green color and the great dispersion are found there, but only know of the Russian and Namibian demantoids. I even asked the seller how it was id''d and how know it''s not a sphene, seller replied that not a sphene, hardness is different and would refund my money if not a demantoid. So it will probably take me a couple weeks to get it, but once it gets here I would love any comments of what to do to determine whether I bought an expensive sphene or an inexpensive demantoid!