Diffused Sapphire (Neelam) Stones

Browse our diffused sapphire (diffusion sapphire) collection — sapphires enhanced through the surface diffusion process to achieve rich, even blue and fancy colours at exceptional value. Precisely cut and calibrated in Bangkok, our diffusion sapphires are ideal for jewellery manufacturers, designers and volume buyers who need consistent colour and size across single stones and lots. Every diffused sapphire is graded for colour, clarity and cut. Whether you need marquise, pear, oval or octagon shapes, our diffusion sapphire stones ship insured worldwide from Bangkok, Thailand.