Cobalt blue, hot pink, ruby-red: spinel is the insider's alternative to sapphire and ruby at a fraction of the price. Ceylon and international origins below.
For centuries spinel was mistaken for ruby — some of history's most famous “rubies” are spinels — and only in the modern trade has it earned its own following. Ceylon spinel comes in cobalt blue, hot pink, lavender and ruby-red, and because spinel typically forms as a single-refractive crystal without pleochroism, its colour can look unusually pure and consistent from every angle.
A large share of spinel reaches the market untreated, which makes it attractive to buyers who prefer stones straight from the ground — but always confirm, since heating and irradiation do occur. Fine cobalt-blue and vivid pink stones are the most prized, and they remain meaningfully less expensive than sapphires and rubies of comparable colour and clarity. Look for lively, even colour and a well-proportioned cut; spinel is hard and durable and makes an easy stone to wear.