How to pronounce“feldspar”in English

These are quartz crystals and feldspar, so most sand in the world on the mainland is made of quartz crystal and feldspar.

Like, Dwayne here is granite: a mix of mostly quartz and feldspar.

Like, Dwayne is granite, which is mostly quartz, feldspar, and mica – but can also have a lot of other minerals such as hornblende, zircon, and magnetite.

But the scientists figured out that that tiny chip was around 4 billion years old and contained minerals like quartz, feldspar, and zircon crystals—