feldspar
You might mean either silica or quartz. Please see the link.
The scientific name for quartz is silicon dioxide (SiO2).
Quartz and feldspar are two common minerals that form rocks. Quartz is often found in granite while feldspar is found in both granite and basalt.
Quartz will probably be found in most igneous and metamorphic rocks. Granite is a classic example of a rock with quartz in it. Search for images of "granite." Quartz sandstone is another rock practically made entirely up of quartz.
Chalcedony
Another name for black quartz is "smoky quartz." This variety of quartz has a brown to black coloration, which is caused by natural irradiation of the silicon dioxide. Smoky quartz is often used in jewelry and is believed to have grounding and protective properties in crystal healing practices.
You might mean either silica or quartz. Please see the link.
Hmm well not really anonther name as such. if the sand is particulary high in a minerla you could name it thus. In the case of a high silica sand i'd be inclined to call it a quartz sand.
Onyx is another name for the sardonyx gemstone. It is a form of chalcedony quartz that exhibits bands of different colors, typically red and white.
The scientific name for quartz is silicon dioxide (SiO2).
Maybe lechatelierite? Or crystal (as in quartz glass)?
Silica
The scientific name for quartz crystal is silicon dioxide (SiO2).
Name is quartz From group quartz
Sio2
Citrines belong in the quartz family. Citrine is the name for quartz that is yellow, greenish-yellow, brownish-yellow or orange. The name is derived from "citron" which is the name of a yellow fruit.
chrome diopside and quartz are two different gemstones. Chrome diopside is sometime found along with quartz and hence the name.