Is it a bad idea to purchase diamonds on ebay without viewing in person? I'm watching this listing in particular https://www.ebay.com.au/itm/323816722821
There are still a goodly number of eBay vendors (including those who offering fine jewelry, loose diamonds, colored gems) who will accept returns, no questions asked. Those are the only ones I'll consider doing business with, when the purchase price is more than I care to gamble.I always say, when you buy from eBay you have to be prepared to lose all the money. If it is a few dollars, worth the risk, a few thousand dollars, no way.
Good luck.