Lab-Grown Yellow Diamonds

Lab-grown yellow diamonds get their colour from nitrogen incorporated into the crystal lattice during HPHT growth, forming isolated substitutional nitrogen (Type Ib) centres that produce a vivid, consistent yellow directly as the crystal forms — no post-growth treatment required. Yellow is the most commercially abundant lab-grown fancy colour, available across the full intensity range from Fancy Light through Fancy Vivid. Intensity grade is the primary value driver: each step up the GIA scale carries a meaningful price premium at equivalent carat weight.