Natural rubies are gemstones prized for their beauty and durability. They have an intense red to pinkish-red colour, which varies according to the concentration of chromium and iron in the crystal. The round shape is one of the most popular and versatile for rubies, as it allows for a cut that maximizes the brilliance and reflection of light in the crystal.
The size of these natural rubies ranges from 6.00 to 6.10 mm, which corresponds to a weight of 1.05-1.30 carats. This is an ideal size for mounting on rings, earrings or pendants. The clarity of natural rubies is very good, with no inclusions visible to the naked eye. Inclusions are small internal or external flaws in the stone that can affect its value and appearance.
The treatment applied to natural rubies is the insertion of special glass, which consists of filling cracks or gaps in the stones with a transparent material that improves their colour and clarity. This treatment is accepted on the international market and does not affect the durability of the stone. The origin of natural rubies is Mozambique, a country in south-east Africa, which has a rich supply of high-quality gemstones.