Striking Yellow Laguna Agate Collectors specimen. This Laguna is 3" x 2". A wonderful full half specimen

凸显黄色湖玛瑙.  半块石

Class: tectosilicate
Crystal system: Hexagonal
Specific gravity: 2.57-2.64
Luster: dullvitreoustogreasy
Transparency:transparentoropaque
Fracture: conchoidal to splintery
Streak: white

Agate is the Mystical birthstone for September. It is also the birth stone for the Zodiac sign of Gemini . Agate is the accepted gemstone for the 12th and 14th wedding anniversaries.

A very small sample of some of the many agates which are found all over the world.  A hard stone, usually within the range of 7-9 on theMohs scaleagates are found in all colors of the rainbow, although green and blue are quite rare.

Agate is a variety ofchalcedonyformed from layers of quartz which usually show varicolored bands. It usually occurs as rounded nodules or veins.

Often tiny quartz crystals form within the stone and add to the beauty and uniqueness of inpidual stones. These crystals are calleddrusy(sometimes misspelled as druzy). Lapidaries often cut just the drusy from an agate and jewelers use these drusy cabochons as the main stone or as an accent stone in their jewelry designs.

Some named varieties are: moss agate, eye agate; and plume agate, which looks like it's filled with beautiful feather plumes (see moreagate variety names).

Agate is a relatively inexpensive stone except for some varieties with unusual banded or scenic markings. In recent years, Montana agate has gained wide acceptance in jewelry and well cut stones with nicely defined patterns often exceed the price of some of the more well known gemstones. Plume agate is another that often brings high dollar.

Agate is found all over the world including: the Africa, Asia, Brazil, Egypt, Germany, India, Italy, Mexico, Nepal, and the USA.