red brown tumbled minerals with names

mineral rock natural stone name set collection gemstone gem raw uncut sample specimen geological gemology mineralogical isolated cutout cut white background polished tumbled rolled pietersite triplite syenogranite granosyenite gneiss andesite lemesite gabbro monzonite andalusite feldspar cryolite gneissoid granite quartzite basalt tuff sandstone oncolite nepheline nephelite brown