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Ltd Edition Coal Bangle with 1 Diamond San Francisco

San Francisco Coal Bangles with One Diamond are made using the serial number from illegal guns and metal from shell casings either swept from crime scenes or turned over during gun buyback and amnesty programs in Pittsburg, CA.  % of the net proceeds from each purchase are donated back to Pittsburg, CA to get more illegal guns off the streets.

Caliber Collection Diamond pieces are non-refundable.


  • There is powerful double meaning behind the name The Caliber Collection®. The first is the caliber of a gun. The second is how the caliber of a city is raised when illegal guns are taken off its streets. The oval shape of the bracelet mimics the trigger cage of a gun and serves as a reminder of the destruction that is caused when the trigger of a gun is pulled. Each series carries a serial number that corresponds with one of the guns that has been voluntarily turned in by an individual to the Pittsburg, CA Police Department on March 16th, 2013 during a privately funded Gun buyback and amnesty program. Embedded next to the serial number is a single diamond (approx 0.11cts); strong, precious and human life. The side of the bracelet is hand hammered to symbolize the hard work required, not only of the police, but of each individual, in the fight to get illegal guns off the streets of their community. This special limited edition finish is inspired by the extensive history of coal mining and industrial development since the late 1800's in Pittsburg, CA. The diamonds used in all pieces of the Caliber Collection® are conflict free diamonds.

  • Sizing: See Guide Materials: Plated Brass

  • Your order will arrive 5-14 days after shipping if ordered 12:00PM (EST). International shipping available. For express or overnight shipping, please email You can exchange or return a Caliber Collection product within 14 days of delivery. Items must be returned in unused condition with all the original materials associated with packaging. Shipping and handling charges are not refundable. A 10% restocking fee is deducted from any Caliber Collection® product returned or exchanged. Additional shipping is required for any exchanges made. If the return is a result of our error or a damaged product, we will refund the cost of the merchandise purchased.
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    Regular price $375 Size Guide

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