When glass is recycled, it is first collected and sorted by colour. Clear, green, brown, blue and red glass can all be recycled, but must be separated because they have different melting temperatures and cannot be mixed. The sorted glass is then crushed into small pieces, known as cullet, and cleaned to remove any impurities.

Malachite is a magnificent blue-green coloured crystal, a derivative of copper. The semi-precious crystal is known to have many healing properties…