DMLY have you had these stones appraised anywhere so far? Even some ML Huillier branches offer testing and verification on diamonds.
I've seen too many fake stones all over mindanao and visayas to believe anything without proper testing, which is why i bought a very expensive diamond tester of my own that I carry around in my car.
England is one of the best places to sell real stones, and it is the place you will find the best price for them. I do have buyers there and yes I could arrange a transaction with a buyer if I had already proven the stones are real myself, and that their is a good quantity available.