Klean Karats Cleaner Pen Click images to enlarge Description Klean Karats Cleaner Pens are safe and effective on all metals and gems including soft, porous stones like opal. The only exceptions are Amber and Ethiopian Opals. Can be used on costume and antique jewelry pieces Click pen with locking mechanism Formula consistency stays on brush *Liquid is biodegradable, meaning it can break down and not contaminate or pollute our water, or our environment. Instructions: Click pen until liquid appears on brush tip Brush cleaner onto jewelry Rinse well You may need to click pen several times before cleaner reaches brush. Rinse brush frequently to prevent clogging Repeat if necessary Track Page Views With Auctiva's Counter Images sell! Get Supersized Images Free Image Hosting