Hello everyone,
I found some rocks in my childhood, kept them for 20 years and now I need to know what they are made of (in case they would harm my gecko),
Any gess of what if could be ? or maybe experiments to help (vinager, magnet, ..) ?
1. bleu, purple, gold, white(solid)
2. dark brown, verry spongious volcanic like
3. black melted like shape, dark gold like depot
4. Iron like, melted shape with cracks
link to rocks images : https://postimg.cc/gallery/B0W35Jq
(I can provide more photo if needed)
Thank you for your help !