But they come with their own little USB adapters. Lol. dont trust any computer without bluetooth built-in from default, this is like asking if you want a notebook without wi-fi. Bluettoh mouses have the advantage that they dont use 1 USB port, as bluetooth is a hidden antena within the notebook.
Definition of arkose. : a sandstone characterized by feldspar fragments that is derived from granite or gneiss which has disintegrated rapidly.
Arkose sandstone from Slovakia Arkose is a kind of sandstone which is rich in the mineral feldspar. It is made mostly of quartz, but also has at least 25% feldspar. It may also consist of fragments (bits) of rock. Arkose usually contains small amounts of calcite cement, which may also contain iron oxide. Arkose is normally grey to reddish in colour. The sand grains making up arkose are usually coarse. Arkose is generally formed from the weathering of igneous or metamorphic rocks. These are usually granite rocks, which contain a lot of feldspar and quartz. Arkose is often found with conglomerate deposits where the sediment is made of granite.