Ursa – Peridot and CZ

Cubic zirconia (CZ) is a lab-created material made of zirconium dioxide, not carbon, and is widely used as an affordable diamond look-alike. It is man-made and can be produced in almost any colour.

Hardness

8–9 (Mohs), usually given as about 8.5

Everyday wear

Cubic zirconia is softer than diamond, so with daily wear it can gradually pick up scratches and lose some sparkle; it may need re-polishing or replacing over time.

Care

Soak briefly in warm water with a few drops of mild dish soap, brush gently with a soft brush, rinse and dry with a lint-free cloth. Store it apart from other jewellery and avoid harsh chemicals, toothpaste and chlorinated water.

Peridot is the gem form of the mineral olivine, ranging from brownish green through yellowish green to pure green. Its colour comes from iron, which is part of its chemistry.

Birthstone

August

Hardness

6.5–7 (Mohs)

Everyday wear

Peridot has fair to good toughness and is durable enough for jewellery, but should be protected from scratches and hard knocks.

Care

Clean with warm, soapy water and avoid ultrasonic and steam cleaners. Keep it away from acids and sudden heat.

Meaning and tradition

The ancient Egyptians called peridot the 'gem of the sun', and in folklore it was worn as a talisman against evil spirits and 'terrors of the night', especially when set in gold. It is the gem for 16th wedding anniversaries.