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Have you been wondering how to shop for a loose diamond— whether you are considering a loose diamond as the start of an engagement ring, to upgrade an existing piece of jewelry, or for another design entirely? Nothing compares to the brilliance and fire of a loose diamond.

By purchasing a loose diamond apart from a setting, you are able to get the best look at the stone to really see the 4 C’s— cut, color, clarity, and carat weight— up close. You can view inclusions that a setting might otherwise hide or distract from, allowing you to make an informed decision about the diamond you are investing in. We are happy to offer our customers an extensive collection of loose diamonds, including different diamond shapes from round brilliant, princess, oval, cushion, and radiant cuts, to different fancy color diamonds.

The Anatomy of a Diamond

Learn about the 4 C’s from our diamond experts. Our diamond education center is loaded with information from the Gemological Institute of America (GIA) so you can rest assured you are making an informed diamond purchase. Learn more before your visit HERE.

Fancy Color Diamonds

Diamonds come in every color of the rainbow, including yellow, blue, pink, green and purple. Fancy colored diamonds are graded based on the depth of color – Fancy Light, Fancy, Fancy Intense and Fancy Vivid. Visit our showroom to experience our fancy color diamond collection.

Create Your Perfect Piece

Are you ready to design your perfect piece? At Casa D’Oro you work directly with one of our jewelers. If you have a design in mind or have seen something you would like to create, our jewelers can help you design that special piece. We specialize in hand made jewelry and perform all the work right here in our store. We believe that everyone is creative and deserves to express themselves. What better way to do it than letting us help you create your very own custom design one of a kind engagement ring. Come in and see what we can do for you. Learn more about custom jewelry design HERE.

Explore our Diamond Search

Get a head start on your diamond search. Explore and compare diamonds by shape, carat, color, clarity, cut, and more with this innovative diamond search tool. Find this online tool HERE. You can begin your search with THOUSANDS of diamonds even before you come in!


Find your perfect engagement ring from Diamonds Ltd. at our El Cajon, CA, showroom, or explore RingBuilder online here


Connect with Diamonds LTD. 

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“Thank you Bob and Peggy Zwibel. My husband surprised me with  stunning diamond earrings from your store for my birthday.
I absolutely love them!

Lena, the store manager, and Elizabeth, were both extremely knowledgeable, helpful and patient through the entire process.   I originally thought that I wanted a rose gold setting, however after seeing the beautiful stones, I realized that white gold would enhance the diamonds so much more.

My husband contacted Lena and she said absolutely no problem to bring them in and they would make the change.  I got them back in half the time they said it would take.  Wow!   When we went to pick them up, the store was a little busy, but everyone was so attentive and oooh’d and aahh’d about how fantastic the diamonds looked when I put them on!!  YAY!  Aren’t I such a lucky lady!

Thank you to everyone at Diamonds Limited!  We are customers for life!

I can’t wait for my next diamond surprise…too soon?  :-)” — Deb B. on Yelp