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Large amounts of agate have been found in archaeological digs of Sumer, dating back to 3500 BC.Theophrastus (372-287 BC) appears to have been the first man to write about agates.In Exodus the Lord ordains precious stones to be used in the making of the breastpiece of the High Priests’ garments.Zechariah says that the Lord’s people will be like jewels in a crown.Agate is named as the second stone in the third row of the High Priest’s breastplate.Agates are a form of chalcedony (a fine-grained variety of quartz) that are banded or lined in a variety of patterns of colored layers.

Amethyst is the third stone in the third row of the High Priest’s breastplate (Ex.

Historically amethyst has been highly valued as a precious stone for the uniqueness of it's color, as there are few purple gemstones.

Aquamarine is a light blue or bluish-green variety of beryl.

It has only been since the mid-1800’s that we have begun to identify stones according to their mineral content.

In Bible times stones were identified by color, such as the Hebrew term odem which simply means “red stone.” This could have been any number of red stones known at the time (i.e. As more information surfaces thanks to archaeological findings and the writings of ancient historians such as Theophrastus (372-287 BC), Elder Pliny (23-79 AD), and Josephus (37-100 AD), we are able to come a bit closer to making some identifications sure.

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