Buy Gem Silica from Crystals By Nature. Crystallized and infused in Quartz, Gem Silica is the highest form of Chrysocolla, exhibiting purity, fabulous color, and translucency. Gem Silica exhibits a vivid greenish blue color due to the prescience of copper deep within the stone. Known as a "Teaching Stone", Gem Silica encourages one to reveal their highest knowledge and offers insights that may be valuable to those who teach or speak for a living. Gem Silica is also a type of Chalcedony, containing valuable healing properties including encouragement, ridding negativity, relationship building, stability, acceptance, and greater inner strength.