Lemon quartz zings brighter than citrine — a vivid, greenish lemon-yellow quartz with glassy brilliance that flatters both silver and gold. Hardness 7, generous crystal sizes, endlessly cheerful.Every lemon quartz at GEMIC Institute is natural crystal, certified by our gemologists in Siem Reap, with photos and video of the exact stone offered. Unique gems; tracked shipping worldwide and our 30-day guarantee.