One of the things we accomplished during our short stay in Singapore was to have our rings cleaned.  We were worried about entrusting our diamond rings (wedding and engagement) to jewelry shops in Manila for fear that our stones might be swapped for fake ones.  I know, that sounds so distrustful but we prefer to err on the side of caution.  Good thing, the shops were we bought our rings in Singapore provide a free cleaning service so I was happy to hand over our precious rings, which we got back after less than 10 minutes.