Green Aventurine 2x4mm Heishi - 15-16 Inch 6mm which tends to be a

which tends to be a strong blue color

and yellow

Ancient Cellar Red Agate is a natural agate that is dyed and heated to give it the unique color and pattern we call Ancient Cellar

Treated quartz that results in a unique blue color

Green Aventurine 2x4mm Heishi - 15-16 Inch 6mm which tends to be aGreen Aventurine is a green translucent quartz with glimmering metallic inclusions. Green is the most common color for Aventurine, but it can also occur as orange, brown, yellow, blue or gray. The color of Green Aventurine comes from Fushite particles within the quartz. It is known as the Stone of Opportunity, and thought to be the luckiest of all crystals.