I had this beautiful necklace custom made with high energy authentic natural Butter Opal. stone beads. Opalescent 10mm. Agate beads are joined with a select few 5.5mm. AUTHENTIC NATURAL BUTTER OPAL beads. The Opals are tiny in size but HUGE in their presence and their energy. They are EXTREMELY RARE. This is a truly one of a piece. It is made with antiqued hypo-allergenic findings.