Amber Quartz

Moon's haunted. We're living on the remains of a long-dead mausoleum, built to honour the bones of this city's previous avatars, clinging on to the hope that the moon won't eradicate every last bit of us. This particular moon belongs to the planet Amber, and our city is named for the deep subterranean spire that defines our core. Amberspire does not belong on the moon, but in this universe, it is locked in eternal war with the four horsemen of ecological warfare: rust, fog, water, and grass. Read more

One of the most basic crafting materials.

You need quartz in Subnautica 2 to craft glass and some electronics. Here's where to find quartz locations in Subnautica 2