Learn About Pink Diamonds
Pink diamonds are rare and highly prized variety of diamonds known for their captivating pink colour. They belong to the larger category of coloured diamonds, which account for less than 0.1% of all diamonds mined worldwide. Among these, pink diamonds are some of the rarest, with natural pink diamonds making up far less than 1% of fancy-coloured diamonds. Pink diamonds can vary in colour intensity from pale pink to deep, vivid pink, and their value is largely determined by the richness and uniformity of the hue.
Origin and Formation
- Pink diamonds form under extreme pressure deep within the Earth, where intense geological stress alters their crystal structure.
- Unlike other coloured diamonds, their pink colour is not caused by trace elements but by lattice distortion in the crystal.
- This rare formation process occurs in less than 0.01% of diamond-producing environments worldwide.
- The unique internal structure is what gives pink diamonds their soft yet vibrant colour.
Evaluation of a diamond
- When evaluating a diamond’s colour, the Gemological Institute of America (GIA) takes into account three key attributes:
- Hue: This refers to the specific tint or shade of colour present in the stone.
- Tone: Tone relates to the lightness or darkness of the colour and assesses how light or dark the colour appears.
- Saturation: Saturation measures the strength or purity of the colour and -gauges how vivid and intense the colour appears within the diamond.
THE PINK DIAMOND COLOUR GRADE
- Pink diamonds are among the rarest gemstones in the world, accounting for less than 0.1% of all diamonds mined.
- The Argyle mine produced over 90% of the world’s natural pink diamonds, yet fewer than 1 in every 10,000 diamonds mined there qualified as pink.
- Pink diamond colour grades range from faint pink vivid pink, with value increasing significantly as colour intensity deepens.
- Each pink diamond undergoes a meticulous transformation process to maximise brilliance, colour richness, and overall beauty.
Saturation and Tone
- Saturation refers to the strength or purity of the pink colour, while tone describes how light or dark the colour appears.
- Pink diamonds are graded on a colour intensity scale from 1 to 9, where 1 indicates the most intense colour and 9 represents the lightest.
- Diamonds with higher saturation and well-balanced tone are rarer and command significantly higher value.
measuring the hue of a pink diamond
- The hue of a pink diamond is a key factor in its value and can contribute up to 50% of the stone’s overall worth.
- Pink diamonds are graded based on their dominant hue and any secondary colour tints using internationally recognised grading standards.
- Diamonds with a pure primary pink hue are extremely rare, accounting for less than 10% of natural pink diamonds.
- Secondary hues can affect value, with strong secondary tones potentially reducing prices by 20-40% depending on their intensity and balance.
Rarity and investment value
- Pink diamonds are among the most valuable gemstones, with demand far exceeding global supply.
- Since the closure of the Argyle mine, natural pink diamond availability has dropped significantly.
- High-quality pink diamonds have shown long-term growth of 8-12% annually in the luxury market.
- Collectors and investors consider pink diamonds a strong store of value due to their scarcity and rising demand.
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