It looks like Chalcedony or possibly Moganite. Both are varieties of quartz.Chunk of Quartz or Calcite I found about 15 miles east from The Hills of the moon at the end of a wash that runs into the Salton sea when there are Huge Rain storms.
Hey thank you, I appreciate you taking the time to help me identify this nice rock.
Well.I did ask! Thanks.And now I know much more than I did.Probably more than you want to know but...
An exceptionally coarse-grained igneous rock, with interlocking crystals, usually found as irregular dikes, lenses, or veins, esp. at the margins of batholiths. Most grains are 1 cm or more in diameter. Although pegmatites having gross compositions similar to other rock types are known, their composition is generally that of granite; the composition may be simple or complex and may include rare minerals rich in such elements as lithium, boron, fluorine, niobium, tantalum, uranium, and rare earths. Pegmatites represent the last and most hydrous portion of a magma to crystallize and hence contain high concentrations of minerals present only in trace amounts in granitic rocks. Adj: pegmatitic.