4mm Sandstone Plain Beads Features:
Bead, garnet (natural), 4mm round, B grade. Sold per 16-inch strand
We liked the color, clarity and quality of these hand-cut gems from India, and think you will too!
Because these beads are hand-crafted, colors and size will range from those stated in our description.
ABOUT 4mm Sandstone Plain Beads: -
Shape: Bead (round in shape with a small hole in the center)
No of beads: 200 - 240 beads on a string
Type: Faceted Beads
Length: 16 inches long
All beads are sold per strand
All strands are 14 inches unless otherwise stated.
Size of beads
2mm=size of aavalu (mustard seed)
3mm=size of sabudana (tapioca)
4mm=size of whole black peppar
5mm=size of kala chana (chickpeas)
6mm=size of frozen peas
10mm=size of blueberry
What is Sandstone?
Sandstone is a sedimentary rock composed mainly of sand-size mineral or rock grains. Most sandstone is composed of quartz and/or feldspar because these are the most common minerals in the Earth's crust. Like sand, sandstone may be any color, but the most common colors are tan, brown, yellow, red, gray and white. Since sandstone beds often form highly visible cliffs and other topographic features, certain colors of sandstone have been strongly identified with certain regions.
Some sandstones are resistant to weathering, yet are easy to work. This makes sandstone a common building and paving material. However, some that have been used in the past, such as the Collyhurst sandstone used in the north of England, have been found less resistant, necessitating repair and replacement in older buildings. Because of the hardness of the individual grains, uniformity of grain size and friability of their structure, some types of sandstone are excellent materials from which to make grindstones, for sharpening blades and other implements. Non-friable sandstone can be used to make grindstones for grinding grain, e.g., gritstone.
Rock formations that are primarily sandstone usually allow percolation of water and are porous enough to store large quantities, making them valuable aquifers. Fine-grained aquifers, such as sandstones, are more apt to filter out pollutants from the surface than are rocks with cracks and crevices, such as limestones or other rocks fractured by seismic activity.