I believe you may be talking about Mica
Slate is a fine-grained, foliated, homogeneous metamorphic of silt. It is able to be cleaved into sheets which can be used as roofing slates, or left thicker to form hard wearing paths, in house building, ornamental fireplaces, and so on.
A clay crystal. Smaller than that, a clay molecule.
the hard parts
Granite and Basalt: 1. Granite is formed from magma that cooled slowly, so it has a coarse-grained texture. It may be pink, white-gray or light to moderate yellow. It contains the minerals feldspar, quartz and mica. Its mineral grains are similar in size. Granite is hard to scratch with a fingernail. 2. Basalt is formed from lava that cooled rapidly, so it has a fine-grained texture. Its mineral grains are so tiny that they can be seen only through a microscope. It may be black or dark green. It contains the minerals feldspar and olivine. Like granite, basalt is hard to scratch with a fingernail.
Slate is a hard, dark grey rock which splits into thin sheets (along a pronounced and dominant cleavage), which makes it very suitable for roofing material.
Yes, it is a strong, hard rock that splits into think layers.
Hornfels, a hard, fine-grained rock. Source: Rocks and Minerals of Pennsylvania booklet
The hard disks of computers are usually glass or aluminum coated with a very thin layer of fine grained magnetic material.
Yes, they can. Not just gymnasts can do the splits, anyone who is very flexible can do the splits if they practice hard.
There are various types of maple and pine each with its own characteristics but the main difference in characteristics is that maple is hard and fine grained whereas pine is relatively soft and coarse grained. There is a list of various types of wood and their characteristics at `Properties and Uses of Woods' - http://www.inquirewithin.biz/Vol1/Woods/wood_properties.htm.
Slate is a fine-grained, foliated, homogeneous metamorphic of silt. It is able to be cleaved into sheets which can be used as roofing slates, or left thicker to form hard wearing paths, in house building, ornamental fireplaces, and so on.
There are two types of deep ocean sediments, abyssal clay and biogenous oozes. Abyssal clays are fine-grained sediment, while biogenous ooze is composed of the hard parts of microscopic organisms.
Gritstone, a hard course-grained sandstone, was used for grinding things to smaller pieces.
first you haft to be a good strecher doing the splits is very hard it can be very pain full if i was u i would go to a gymastics place
When dirt gets into layers and then it hardens and becomes hard like a rock.
It can be described as aphanitic. This just means that the rock has very small, hard to see crystals. The crystals do not have time to grow large when they are exposed to the air so they cool quickly and remain small. If water is added to the melt, the texture can be described as glassy (like obsidian).
The three chemical layers of the Earth compare to the layers of a hard boiled egg as follows: the shell equals the crust, the egg white equates to the mantle, and the yolk represents the core.