This natural Old European Cut Diamond measures 6.5mm for an approx 1ct L/SI1.  The ring has not been taken out of the mounting for weighing, so size is approximate by mm measurement. It does show minor signs of wear the the girdle (very outer edge),  but it can only be seen under 10x magnification.   

The diamond is in its original vintage mounting. The head of the ring measures 6.75 at the widest point and the shank measures 1.25mm at the back.  The shank can be considered thin to some due to  normal wear for it’s age, so we can half shank the band to make it thicker for an additional charge. 

The ring weighs 2.2g and measures 7mm at its widest point. It is stamped 14k yellow gold.

Ring size is 8.25 and sizable. I can size it for an additional charge. Let me know if you need a quote.