TeAra
First congratulations, you are finding some real cool rocks. Thanks for showing them to us.
But can I make some suggestions on you pics.
Try to use natural light.
Put one or two similar rocks on a solid color background, fill the viewfinder with rocks. No hands. I use the top a rusty 50 gal drum. It soaks up the light and helps minimize reflections. The natural light gives the truest colors.
If you are trying to show a transparent or translucent rock, then try getting a shot on an oblique angle to the suns rays shining through the rock. If it doesn't come out in the photo, then just describe it's transparency.
Lastly, when you post a pic with many rocks it.just tells me you had a good day. A couple of good shots, from different angles, of one rock will give us more to work with.
We still haven' t ID'd some of the rocks from your first post. I would like to see some more shots of the blue and white one.