The high dunes are formed by quartz grains.

The nucleus can be a shell fragment, quartz grain or any other small fragment.

It consists mainly of quartz grains that are cemented by silica.

When sandstone is changed to quartzite, the individual quartz grains and cement material recrystallizes.

The sand is predominately made up of quartz grains.

In addition to studies using the modal composition of a sediment, other provenance determinations can be made from individual quartz grains.

Minerals giving very low intensity emission, such as quartz grains, required many minutes or even hours of exposure with fast films.

Sandstone, for example, can hold very large volumes of groundwater because spaces are formed between the rock's rounded quartz grains.

The sandstone almost entirely consists of rounded quartz grains.

The sandstone in the Tithonian is mostly rounded quartz grains, but also 14% of carbonate rock fragments.