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Mailing Address:

26497 Rancho Parkway South | Lake Forest, CA | 92630

Product Support & General Inquiry:


Sales Support:


Warranty Info

At LIQUIDIAMOND Knives, we believe in standing behind our products. Therefore, we offer a limited lifetime warranty on all of our knife products. Please complete and submit the form below to register your product(s).

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The warranty covers all defects and damage to the knife in accordance with our Care/Use Guidelines (see next section). We will repair or replace your qualified, and registered product for life. If you believe your LIQUIDIAMOND Knives are ever damaged or defective, please contact

Further, to ensure you remain completely satisfied with the performance of your LIQUIDIAMOND Knife, we offer complimentary professional sharpening of your qualified and registered product for life. You only need pay the nominal shipping & handling costs. Should you ever feel your LIQUIDIAMOND Knife has lost its edge, please contact


Care/Use Guidelines

The LIQUIDIAMOND Edge product is unique in its construction with a stainless steel body and and edge made from the LIQUIDIAMOND alloy. Like all quality knives we recommend that you wash them by hand and dry before storing in a safe place. It is always best when using the product to use it on a knife friendly cutting surface or cutting board to extend the life of the sharp edge. You should experience edge life several times better than you see with a steel knife. We do not recommend using a honing steel to "align" the LIQUIDIAMOND Edge. The LIQUIDIAMOND Edge is much harder than steel with different wear mechanisms and does not fold over like steel.



Return/RMA Procedure

Please contact us at for specific return instructions and Returned Material Authorization (RMA). Please make the subject line read: “RETURN REQUEST” and include all pertinent details in the email body, including your registered customer name.

We will contact you promptly to address your concerns.