Neither ruby shows any indication of heat treatment. The ring is mounted in unmarked but tested 18 carat yellow gold. There are some marks to the interior of the shank which might have been a signature, but these have been worn away. UK finger size O, US size 7.5, but may be resized with ease. This item is in the category "Jewellery & Watches\Fine Jewellery\Rings".The seller is "shinyprettythingsltd" and is located in this country: GB. This item can be shipped worldwide.