Oh, my ring is also PT900! Was yours, by any chance, made by Mark Morrell?I notice the prongs seem heart-shaped, which he does too! Either way, it's very lovely and simple!
For anyone interested, Mark Morrell wrote an explanation of the common types of platinum alloys, and why he prefers PT900: http://www.mwmjewelry.com/platinum_purity.htm
To be honest, having worn both my gold and plat rings daily for the past 6 years, I don't notice one wearing harder than the other. My silver pieces, however, do get bent all out of shape if I'm not careful!
Good eye Mewt! It is a Mark Morrell - slim petite torchiere. So comfortable to wear
