OSI Model - The Lower Layers The bottom four layers of the OSI model are often referred to as the lower layers: â¢ Layer-4 â Transport layer â¢ Layer-3 â Network layer â¢ Layer-2 â Data-Link layer â¢ Layer-1 â Physical layer Protocols that operate at these layers control the end-to-end transport of data
Ross-Simons' Agate Jewelry. Agate is a variety of chalcedony that comes in variety colors making it ideal for all kinds of jewelry designing. Blue agate is as expected, light blue. Moss agate is dark green, often with clear patches.Tree agate is green and white.gate: Stripes Earned by Nature. With its combination of earthiness and elegance, agate is one of the most unusual gemstones. There are many varieties of agate, including blue lace agate, moss agate, tree agate and petrified wood.
Folks, None of those appear to be [B]Agate[/U] (A distinctly banded variety of Chalcedony). [B]Banded[/U] being the discriptive word for this form of Chalcedony from the Quartz family of minerals. They all appear to be fine examples of Chalcedony, due to their silky fine grained silica looks. Of course they could have been broken or cut from the Eye of an Agate.