About Since1910.com - H.L. Gross & Bro. Jewelers We are a 5th generation, family owned couture jewelry business established in the year 1910.  Located in downtown Garden City, Long Island, there are currently 3 generations working together at H.L. Gross & Bro. Michael Gross is 4th generation family member and President.  Brad & Matt Gross are 5th generation and Vice Presidents, and Helene Gross is third generation and treasurer

We have on premises three GIA Graduate Gemologists, a jewelry manufacturing and repair facility that includes a state-of-the-art laser welding machine. We also have a watch repair facility equipped for complete overhauls and maintenance on fine Swiss watches.Our Gem Lab Includes microscopes refractometers (used to determine the refractive index of stones) a sarin machine used to measure the cut grade of a diamond. a colorimeter to grade color. ultra violet light for determining fluorescence.

Direct Relationships. We pass the savings onto You! Having sold over 35,000 engagement rings, we are extremely experienced with every facet of the diamond business. We have 50 year old relationships with the largest diamond suppliers, many of which are De Beers site-holders. This means we are purchasing the diamonds from the source, eliminating the middleman, and passing the savings on to you. We guarantee the lowest diamond pricesOur Reputation We are members of the prestigious AGS (American Gem Society) and as such must adhere to their strict guidelines of business practices and professionalism. We are also members of the GIA, Jewelers Vigilance Committee, The Retail Jewelers of America, The New York State Jewelers Association and the Better Business Bureau. To view our Better Business Bureau certificate, click on the logo below. Learn more about our history. Our reputation is our most precious commodity and we go to great lengths to see that every piece we sell is the best it can be. We stand behind our products to provide the ultimate in customer satisfaction and have many families that keep returning to us generation after generation. We look forward to the opportunity to serve you!

Community Involvement and Philanthropy Michael Gross is a member of the Garden City-Mineola Rotary Club, has served numerous terms on the Board of Directors of the Garden City Chamber of Commerce and was honored by the Nassau Council Chambers of Commerce as 16th annual small business person of the year. Recent charitable contributions have included an in store event to benefit the Diabetes Research Foundation, a donation to the Gift of Life and numerous local charities and being the major contributor to the Garden City Make a Wish Foundation annual fundraising event.