Calcedon Crystal

I live in Bali , Indonesia and are visiting sites of interest in Java . Caves. Some parts of Java is full of small and huge cagesystems. Not flooded. I found what I believe is chalcedony crystal. Huge pieces and a lot .Can anybody verify if it is chalcedony? Ps I collect rare minerals and crystals from Indonesia. DS Excange info ?

Hi I would be interested in having a look at what you have found. I live in Australia & love going rock hunting & finding new things or unusual things that can be challenging to figure out what mineral they might be. You can add me on Facebook my name is Jason Hollis & my picture is an Australian opal