thank you steve for giving me a better understanding on placer vs hard rock .........i guess those 2 woman from from the UK just got lucky at the Taal volcano ,,,,,,there father was a geologist and the nuggets were fist size ,,,,,,that was the first time those women used metal detectors and the first time at Taal they said the father sent them here to find the gold that was years ago .....so placer might be found from old (millions of years ) lava flows ....my understanding of Taal is nobody ever looked on the crater island ,,,,,thanks again steve