large-grained

The rock here is a porphyritic granite (porhyritic meaning that the stone has large-grained crystals, such as feldspar or quartz, dispersed in a fine-grained feldspathic matrix or groundmass).

Of Books and the Sea greygirlbeast 2010

The rock here is a porphyritic granite (porhyritic meaning that the stone has large-grained crystals, such as feldspar or quartz, dispersed in a fine-grained feldspathic matrix or groundmass).

Of Books and the Sea greygirlbeast 2010

The difference in temperature between the warm ground and cold snow causes the flakes to form large-grained, square or cup-shaped facets, known as depth hoar, which don't bond well.

Heavy Snows Trigger Deadly Avalanches 2008

It had happened at the dinner at the funeral of Kostukov that the old deacon saw among the savouries some large-grained caviare and began eating it greedily; people nudged him, tugged at his arm, but he seemed petrified with enjoyment: felt nothing, and only went on eating.

The Witch, and other stories 2004

Some are large-grained, of a pink colour, and appear in blocks, which, flaking off under the influence of the atmosphere, form ooidal blocks and boulders piled in irregular heaps.

Personal Narrative of a Pilgrimage to Al-Madinah and Meccah 2003

On the plain to the north of the Jebel el-Abyaz also, I found curdles of porphyritic trap, and parallel trap-dykes, cutting the courses of large-grained grey granite: as many as three outcrops of the former appeared within fourteen yards.

The Land of Midian 2003

I return then to my large-grained powder, which removes those difficulties.

From the Earth to the Moon 2003

“We shall have to employ a large-grained powder,” continued the major; “its combustion is more rapid than that of the small.”

From the Earth to the Moon 2003

The stones at the bottom of the rivers appeared very fine, large-grained, dark coloured granite, of a kind quite different from the mountain rocks, or from any stones which they had ever seen in the colony.

Journal of a tour of discovery across the Blue Mountains, New South Wales, in the year 1813 2002

The large-grained surface snow was glittering like millions of tiny mirrors, and two bearded and grizzled figures emerged from a Scott tent among clusters of black volcanic rocks.

Terra Incognita Wheeler, Sarah 1996