Hardness: 8.5 Mohs

Quality Information: Colourless, can be grown in a rainbow of colours to resemble coloured diamonds.

Care: Rated “fair to good” for everyday wear with care. Avoid exposure to heat, contact with chemicals, and protect from scratches and harsh blows. To clean, gently scrub with a soft toothbrush and a solution of mild dish soap and warm water.

Known as the best diamond simulant, cubic zirconia are lab grown using elements of Zirconium dioxide, known as baddeleyite, which is a natural gemstone. Its main competition as a synthetic gemstone is the more recently cultivated material simulated moissanite. You can tell a diamond from a CZ from the see-through test- this means if you put a diamond and a CZ top down over some writing, with a diamond the dispersion is high which will make you unable to read anything. With a CZ you can generally read what is underneath.