The orange diamond is often overlooked by the general public, overshadowed by the celebrity of yellow and the rarity of pink. Yet it is one of the most fascinating stones in the fancy diamond palette — and one of the most difficult to definitively identify.
The Science of Orange
Like the yellow diamond, the orange diamond owes its colour to the presence of nitrogen in its crystal lattice. But the particular arrangement of these nitrogen atoms during and after the stone's formation creates a different absorption of the light spectrum. The atoms absorb both the blue and yellow regions, giving the stone its characteristic orange tint.
Between Yellow and Brown: A Delicate Boundary
One of the particularities of the orange diamond is the difficulty in clearly distinguishing it from yellow or brown in certain nuances. Hues can be so variable and so close to one another that only experienced gemmologists, using specialised instruments, can establish a definitive classification. Some very deep orange diamonds take on almost brown reflections, creating unique colour effects that are highly sought after by designers.
Warm Nuances
The orange diamond palette ranges from luminous pale orange to deep, saturated orange. These warm tones evoke sunsets, flames, embers — an intense visual warmth that creates a spectacular contrast with white gold or platinum.
The orange diamond brings contemporary fine jewellery a palette that designers are increasingly exploring, as laboratory production continues to advance.