Debra Levine is the owner of Diamonds on the Rock. She is a Graduate Gemologist and a former GIA Diamond instructor. At Diamonds on the Rock we will educate you on the 4 C's of Diamonds to assist you in selecting the perfect Diamond. We are San Diego diamond experts! We are located in the Bird Rock, La Jolla beach community. 

Diamonds on the Rock is a San Diego jewelry studio that specializes in custom design, jewelry alterations, and jewelry repairs. We are competitive with online pricing and offer wholesale diamonds to the public. At Diamonds on the Rock we will educate you on the 4 C’s of Diamonds to assist you in selecting the perfect Diamond for any occasion.

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    loose diamonds in san diego

    The 4 Cs of Diamonds

    Diamond professionals use the grading system developed by the G.I.A. (Gemological Institute of America) in the 1950s, which established the use of four important factors to describe and classify diamonds: Clarity, Color, Cut, and Carat Weight.

    Diamond Clarity inclusion san diego diamond


    Clarity grades are based on the number, size, relief, and positions of inclusions that can be seen under 10x magnification. Inclusions can be dark or light.


    Precise workmanship is required to cut a diamond so its proportions, symmetry, and polish maximize brightness, scintillation, and fire.

    Diamond Cut variation Display san diego diamond
    Diamond Color Display Chart san diego diamond


    GIA’s D-to-Z scale measures the colorlessness of a diamond, comparing it to masterstones under controlled viewing conditions.


    Carat vs. Karat One Carat is equal to 0.20 grams. Only one in 1,000 diamonds weighs more than a carat.Karat is a unit of measure used to describe how much pure gold there is in an alloy.

    Carat Weight Beam Scale san diego diamond
    Always make sure there is a Certificate.

    GIA certified San Diego diamond experts!

    We have been selling certified loose diamonds in San Diego for over 30 years! All our Diamonds are graded by the G.I.A (Gemological Institute of America). We use an independent laboratory to obtain our diamond reports. This is important to see before purchasing a diamond, it insures that the diamond has undergone an unbiased professional examination. this is to protect the consumer from buying a overrated diamond. Diamonds On The Rock has the best selection of loose diamonds in San Diego. We carry a large variety of diamonds in all shapes, sizes, and qualities! We work very closely with suppliers all over the world, and this allows us to compete with internet sites to give you the best value on our diamonds. That is why our customers always come back. 

    Ethical Sourcing

    All diamonds purchased through Diamonds On The Rock, have undergone extreme measures. This is to insure that all our diamonds are conflict free! We purchase and sell diamonds through suppliers that all adhere to the Kimberley Process. The Kimberley Process is an international process that focuses on insuring that all diamonds have been obtained through ethical and legitimate sources.


    Diamonds undergo high scrutiny because subtle variations in color, cut and clarity can cause significant differences in a diamond’s value.

    Placeholder san diego diamond

    Most Popular Cuts

    Diamond cuts go in and out of popularity, we always keep an eye on these trends and stock the best cuts! Pictured below are some of the current best selling shapes.

    Round Diamond
    Radiant Cut Diamond
    Emerald Cut Diamond
    Cushion Cut Diamond
    Heart Shape Diamond
    Asher Cut Diamond

    Come visit our retail location in La Jolla California!

    People Love Us On YELP!

    Use your new diamond education to buy Diamond !