The last lick with the hammer must of got it! You can beat the crap out of a sapphire with dead flat hits like that but if you drop it on a tile floor or hit the edge of it POW! It's busted, trust me, I've managed to shatter or crack 2 different sapphire crystals accidentally! One fell on the ceramic tile floor of my kitchen and shattered an the other one I barley nicked the corner of my granite bathroom sink and it cracked across the middle of the crystal! The first watch that I dropped was a deep blue T100 w/sapphire (busted) and the other was my GEN Omega PO, it cost me $700+ to have that one replaced by Nesbitts in Seattle!