Rubies, together with sapphires and emeralds, are the so-called “big three gemstones”, i.e. the most popular red-blue-green trio among colourful gemstones. The ruby is a type of corundum and with regard to hardness, only the diamond is harder than the ruby. Its lustre stays shiny with minimal care, and it can even withstand swimming in the sea. However, it can be quite fragile. Therefore, you should protect it against pressure and temperature shocks.
COLOUR: Rubies occur in shades from pink to bright red. Corundums in light pink and all other non-red colours are categorized as sapphires. Natural gemstones are often treated with regard to their colour.
CUT: Ruby jewellery is most often decorated with gems that have traditional round or oval cuts. We recommend the latter mainly for rings. We can also come across other “fancy” shapes that are used, like marquises, hearts or teardrops (teardrops are great for pendants).
CARAT: The weight of a ruby, similarly to other gemstones, is expressed in carats (ct) to the second decimal place. 1 ct = 0.2 g. For earrings and jewellery with more than one ruby, we always state the total number of carats of all stones.