sizes may vary because its natural gemstones made by nature sizes are around 0.025-0.50 inches (4-15 mm) Aventurine is a form of Quartz. Aventurine benefits the thymus gland and nervous system. It balances blood pressure and stimulates metabolism, lowering cholesterol. Aventurine has an anti-inflammatory effect and eases skin eruptions, allergies, migraines, and soothes the eyes. It heals the lungs, sinuses, heart, and muscular and urogenital systems. In addition to the generic healing properties of Aventurine, specific colors have additional attributes: Aventurine is a stone of prosperity. It reinforces leadership qualities and decisiveness. Promotes compassion and empathy. Encourages perseverance. Aventurine relieves stammers and severe neuroses. It stabilizes one’s state of mind, stimulates perception, and enhances creativity. Aids in seeing alternatives and possibilities. Calms anger and irritation. Promotes feelings of well-being. Aventurine balances male-female energy