There are many places in the Davis Mountains where this type of specimen can be found. The road cuts between ALpine and Ft Davis, and Ft. Davis and Balmorhea often have this kind of rock in them. The host rock is a basalt with either little quartz geodes or feldspar crystals (moonstone) in it. The quartz grew in cracks in the rock by precipitating out of the water that was moving through the cracks. While a lot of the quartz is white to clear, some is brown or black, and it can make very interesting specimens.
This type of quartz formation can also be found in the hills near Presidio, TX, and north of Silver City, NM.
There are many places in the Davis Mountains where this type of specimen can be found. The road cuts between ALpine and Ft Davis, and Ft. Davis and Balmorhea often have this kind of rock in them. The host rock is a basalt with either little quartz geodes or feldspar crystals (moonstone) in it. The quartz grew in cracks in the rock by precipitating out of the water that was moving through the cracks. While a lot of the quartz is white to clear, some is brown or black, and it can make very interesting specimens.
This type of quartz formation can also be found in the hills near Presidio, TX, and north of Silver City, NM.