Blauweiss Berkowitz Jeweler’s Mobile App merges our 4 Generations of diamond and jewelry experience with the cutting edge technology available today. Our Family business spirit extends to you through the convenience of online mobile shopping. Our stunning videos, pictures and detailed descriptions bring these items to life. Browse tens of thousands of GIA Certified Diamonds with the ability to purchase or view them in NYC! Shop our meticulously crafted Fine Quality Jewelry inventory.