Vintage Size 9 10k marked solid rose gold Weight is 2.06grams I can’t find info on the makers mark Looks likely a heart or a diamond shape with a symbol or letter in it A 6x4mm flat top faceted blue stone. Oval fancy cut?. To be honest the two other listings I’ve found with this ring say it’s a blue sapphire, but it would register as a diamond. It is not. Unless my diamond tester is messed up, It is registering as a low heat genuine stone of some sort. Options would be a tourmaline; a quartz, or a tanzanite or iolite. It is a very clear stone I believe if it’s genuine it’s either very high quality or it’s a quartz as they tend to be flawless. Otherwise it could be a lab stone Has the color display of a blue tanzanite or a bicolor tourmaline as it has purple and blue in it. With flashes of light blue. I honestly don’t know what it is. Sorry. Selling as is. It’s absolutely beautiful though! Such a pretty blue/purple! Two heart scrolled shape designs next to the stone, east west set. Balls of 10k rose gold below the hearts and on top and bottom of the stone Ring is minimilistic, Dainty; elegant, feminine Great gift idea Band just below heart is 3-1.5mm wide and 2-1mm thick descending to base I ship daily in a ring box Ring is in excellent condition for vintage! Band is still almost perfectly round. Reasonable offers welcome Thank you Check my page for more and bundle to save *stone is secure but it’s best to have a jeweler check any vintage jewelry*