Calcite is the principal constituent of limestone and marble

It has a crusted edge and measures 21x15x8 mm

and quartz may be white

or Specularite

It is thought to enhance communication skills

Zircon | Oval Cut | Blue | 7x5mm | Cambodia Pistacite Calcite is the principal constituentProduct Type: Zircon Approx Weight (per piece): 1. 15ct Size: 7x5mm Shape: Oval Cut Color: Medium Blue Clarity: Clean Origin: Cambodia Zircon comes in a variety of colors, including blue, yellow, green, brown, and red, and is renowned for its exceptional brilliance. Blue zircon, in particular, is highly sought after for its vibrant and saturated hue. Zircon is found in many locations worldwide, including Sri Lanka, Myanmar, Cambodia, and Australia.