As with commercial grade unheated natural sapphires, commercial grade Spinels are abundant. Below are some examples of regular Spinels most people come across in stores or at their local jeweller.
Commercial grade spinels come as cheaply as $200/ct for sizes under 3cts. However, aesthetically beautiful, well-cut and 100% unheated Spinels are difficult to source. Often times, Spinels, like above, that come through our hands do not make through our quality controls. Investment-grade Spinels in shades of pink, blue and red can command a minimum of $4000/ct and upwards. This is assuming the Spinel is eye-clean/loupe-clean, well-cut with no colour zones, no areas of large windows, no areas of dark shadows.
Some examples of fine quality Spinels are as below. Well-cut, aesthetically beautiful & 100% natural Spinels are becoming increasingly difficult to source.