Colour Gemstones

Colour Gemstones

Colour Gemstones are often enhanced in the production process. Coloured Gemstones offered by Costco have been enhanced unless otherwise stated.

Commonly used treatments used to improve or alter the colour of a gemstone can include heating or dying. Please refer to the Gemstone Enhancement and Care Guide for individual gemstone information.

Colour gemstone selections may vary by season and availability. Please click here for the most current availability on Select colour gemstones may be available at your local Costco warehouse.


Care and Maintenance

Avoid extended exposure to direct sunlight, extreme heat, or sudden temperature changes as this may cause the gemstones to fade or break.


Gemstones vary in hardness and are susceptible to becoming scratched. It's important to wear and store your gemstone jewellery with care.


Avoid all harsh chemicals such as bleach, ammonia and hair spray as they may damage metal and gemstones.


Please remember to have your jewellery inspected by a qualified jeweller every 6 months for any needed maintenance or repair.