This is by far the best metallic ink palette out there. Fantastic shades and very long-lasting.
Made of mica, a natural mineral that offers a wide variety of metallic shades, from gold and silver to iridescent, shining pearl colours. Activate with a little water on the palette and apply to the nib with a brush. Adheres to all absorbent surfaces, such as paper, wood, gypsum, etc.
Colours: Tibet Gold, Inca Gold, Arabic Gold, Gold Pearl, Moon Gold, Sterling Silver.
(There are tons of forums, links and youtube videos that show you how to best use this product. Here's one we like: http://www.aninarubio.com/blog/2014/11/4/mighty-mighty-finetec)