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WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer, birth defects or other reproductive harm (www.P65warnings.ca.gov).


The Murua silver and brass electro-finisher delivers an easier, faster and more effective finishing option for jewelry pieces. Inside the finisher, prepared workpieces are immersed in a solution specially formulated for silver and brass (available separately) that coats the metal surfaces. The finisher, based on mechanical-galvanic principles, uses mechanical agitation to bombard the piece with tiny particles of plastic media. As they bump against the workpiece, the particles temporarily disturb the coating, allowing the charged bath to cause electrolytic depletion, polishing the metal surface—even the finest details and crevices of the design—in the fraction of a second before the coating is restored.
This compact, innovative machine is designed to handle silver and brass workpieces and produces higher-quality results faster and more easily than traditional mass-finishing methods.
• Load jewelry pieces onto the accessory hooks on the parts holder (fixturing unit) that fits into the power head; choose the holder and hooks (all available separately) that best accommodate the size and shape of the pieces you want to finish.
• Gemstones (at least 7 on the Mohs hardness scale) and non-metal components need not be removed; they are left untouched and unchanged by this process.
• Protect the geometry of your workpiece—traditional mass-finishing methods don’t polish at an even rate, resulting in rounded edges and muted details. This revolutionary system polishes at an even rate, protecting your design.
• Easily recover the precious metal that is removed in this process. There are no abrasives mixed with the metal—just scrape the dry cathode and send scrap to the refinery for metal recovery. No more trying to sweep up and collect dust filings—it’s all collected in the machine.

  • Brand : Murua
  • Model or style no. : Silver/brass
  • Dimensions : 22"H x 12" dia.
  • Voltage : 110/220 volts (dual)
  • Country of origin : Spain
Additional Specifications:
  • Output power: 150 watts

Please Note: IMPORTANT: This item is wired for dual 110- and 220-volt capability and is sold with a U.S. plug. Because amperage, outlets and plugs vary widely by location, you may need a different plug. If so, you are responsible for having the appropriate plug or adapter installed by a qualified professional. Rio Grande assumes no liability for improper or inadequate re-wiring or adapters procured by customer.
• Processing liquids are sold separately.
• Jewelry parts holder and hooks kits are sold separately.
• For best results, workpieces should be prepared to at least a 400-grit scratch coat before finishing in the Murua.
• Machine patented and manufactured by GPAInnova. Technology and products developed by MEFID. Concession of MEFID/HISPANA.

Catalog page: 2018-2019 Tools and Equipment Catalog p. 495
Kit set includes:
  • One Murua electro-finishing control head with power cord.
    One solution tank and body unit complete with holder support accessory.
    One rinse tank kit.
    Two wrenches: one hex key, one box wrench.
    One user's manual.