Browse Items (264 total)

Have a look at the quartzites (L520, L521) in the 1A Reference Series.

See cross-hatched twinning.

Have a look at the ferruginous sandstone (L327) and the quartzite (L521) in the 1A Reference Series.

Have a look at the rhyolitic glass (L113) and the porphyritic andesite (L130) in the 1A Reference Series.

Have a look at quartz (M410, M411, M412) and calcite (M540, M541, M542) in the Reference Series.