does anyone know what these rocks might be

whilst walking i came accross these specimins i live about 100km south of Uluru-..the massive quartz piece was given to me and was found on the border of WA and SA..

Best guess would be Selenite. try scratching it with your fingernail, its a part of the gypsum group and really soft.

The white one selenite as mentioned above

The brown / white one that looks like marbled beef is probably ironstone or compacted reconstituted jasper grit but I can't be sure with the size of screen I am looking at

Other ones . Dunno it's not a clear enough photo

cool...the white one is very soft and when wet has the consistancy of a wet sponge...the one that looks like beef is as hard as anything..very beautiful to look at...the other rock is red brown with a quartz vein running through it..

the whiteone is calsite the red is red jasper with quartz vains runing through it not shore about the others

cool...might try polishing the red stone up..

The red one would look awesome if it was cut and polished into a door stop

I am visualising a rectangular block of the stuff with some felt glued to the bottom , and maybe a finger hole drilled through it for lifting

But some people might like a rounded form ?

Maybe cut in half and used as book ends ?

If its jasper then it's extremely tough to cut , even with diamond segments , ironstone can also be a pain to cut depending on its purity but that stuff is diverse in its concentration , hardness and abrasiveness ( cerchar scale to any geologists here )

one of them look like Mookaite