Agate:

Physical properties
Agate is a variety of chalcedony, characterized by its fine-grained structure and banded patterns. It comes in a wide range of colors, including white, gray, blue, green, and brown, often with intricate, swirling designs. Agate has a hardness of 6.5-7 on the Mohs scale, making it durable for jewelry and decorative items. Its translucent to opaque appearance and smooth texture make it a popular choice for carvings, beads, and cabochons.
history
Agate has been used since ancient times, with evidence of its use in Mesopotamia, Egypt, and Greece. It was often carved into seals, amulets, and jewelry, and was believed to have protective and healing properties. In the Middle Ages, agate was used in talismans to ward off danger and promote strength. Today, it remains a popular gemstone for its beauty and versatility.
Symbolism & Beliefs
Agate symbolizes balance, stability, and harmony. It is often associated with grounding energy, emotional healing, and mental clarity. Many believe agate helps to calm the mind, enhance concentration, and promote inner peace. It is also seen as a stone of protection, often used to ward off negative energy and bring balance to the body and spirit.