At A-One Gems we are the third generation diamond merchants serving all the states of U.S. for over 3 decades with ever increasing trust and reputation built with each passing year. We are well-known in the diamond industry for integrity and reliability.At A-One Gems we ensure that every order is closely monitored to ensure prompt delivery to every customer. We make sure that we scrutinize every order with precision, and we ensure that our customers do not find reason to complain.Once you become our customer you would realize that our prices are very competitive in spite of various competitors in the market and the rising prices of diamonds.While dealing with A-One Gems you would enjoy a great inventory advantage because. We carry a huge variety of diamonds in all colors, shapes, and sizes.We carry Round, Marquise, Pear, Oval, Emerald, Heart, Princess, Cushion, Half-moon, Trillion, Kite,Trapezoid, Radiant and many other fancy shapes.We carry Tapered and Straight Baguettes.
The Sizes range from 0.005 to 4.00 carats, (melee, single cut and full cut).
We carry colors from D to Z in white diamonds and off-white diamonds.
We carry irradiated and natural fancy colors like Black, Blue, Canary Yellow, Green, Gold, Pink, Purple, Brown, Orange, Red and natural Champagne & Cognacs.
We carry precious stones mainly Ruby, Sapphire and Emerald.
We carry regular, promotional, commercial, fine, non-certified and certified stones.
We are well known for Belgium cut, Thai cut, Russian cut and Rose Cut, Black & multi color Sapphire Beads and Briolettes.
We also carry Baguettes and Bracelets. 
For your convenience we are located in the heart of New York City for the past 3 decades. During these years we have built a reputation belonging to a class of firms whose sole motto is Customer satisfaction through its outstanding products and services. Our friendly and professional approach has earned us an immense fondness with customers, both, at home and abroad.
 We specialize in blue diamonds, green diamonds, yellow diamonds, cognac diamonds, champagne diamond, black diamonds, rose cut diamonds, black bead & black briolette.