Product blurb: (copy/pasted from Officeworks 'cause W/W got nothing)
These Sharpie Permanent Markers contain fade and water-resistant ink and will leave permanent markings on almost all non-porous surfaces. It contains metallic coloured ink for leaving a sheen on your work and it's quick-drying to prevent smudges and smears.
• Each marker has a 1.0 mm bullet tip.
• It's suitable for use on paper, card and other non-porous surfaces.
• The oil-based ink is designed to be long lasting and permanent.
• The metallic sheen will stand out on both dark and light surfaces.
• There are 6 markers in this pack in the colours gold, silver, bronze, ruby, emerald and sapphire.
Or if you have Amazon Prime you can get BIC Intensity Permanent Fine Point Markers - Pack of 12 for $8.88 ($9.35 plus 5% discount at checkout)