You can't decorate a rock to make it look like a gemstone because that is impossible, but you can polish it to make it look pretty.
it look like a magam
what does a meramorphic rock look like
Try digging at mines and look near your house
rainbow rocks look raibowbut it has the colors [yellow silver gold red ]
red rocks
A kind of chemical composition, found in almost all gemstones or look on the book: Gemstones of the world.
they are hard and they look atractive
Out of the ground they look like little rocks/crystals. It is only when they are cut and polished that they look like they do in a ring.
just decorate a cardboard box and make it look like a chosen biome.
What will look amazing to you may not look so good to others. As it is your room and you will be living in it, just decorate it the way you like it.
One can decorate one's home to look like a castle by putting up Gray blankets on the walls, adding portcullis cut-outs on the doors, and creating a moat made out of blue card around a room.
beans and a sausage