I think for any kind of stone, you buy it bc you love it.. Jewelry these days really isnt an investment that you can reasonably expect any kind of good return on or even minimal loss- even if youre talking real diamonds. Least not unless you get into pieces that are priced with a few more 0s to the left of the decimal
I have the same conundrum and im going with an Amora moissy till the Gem comes out, mainly due to the durability and superior sparkliness. At that time ill prob just make a new piece of jewelry with the moissy and stick the Gem in the ering bc who cant use another good piece? :-D