Formed deep within the Earth under high pressure and temperature, then carried towards the surface in volcanic rock.

Their geological origin and rarity are central to their appeal.

Created in a laboratory or factory by HPHT or CVD growth methods, usually beginning with a diamond seed.

They have essentially the same chemical composition and crystal structure as natural diamonds and look the same to the unaided eye.

Natural diamond crystals grew over geological time. Their inclusions and growth features record the conditions in which they formed.

High-pressure, high-temperature growth recreates aspects of the conditions in which diamond forms, using carbon, a seed and a catalyst in a press.

Chemical vapour deposition breaks down carbon-rich gas so carbon is deposited onto a diamond seed in layers.

Some people value geological age and natural origin; others prefer a modern, human-made route. Neither preference needs to be dressed up as a technical judgement.

Compare like for like: shape, dimensions, cut, colour, clarity, carat weight, report and setting. Market prices differ and can change.

Ask for the origin to be disclosed clearly and check the grading report. Specialist testing is required to distinguish laboratory-grown and natural diamonds reliably.

Choose for the enjoyment and meaning of the ring, not on an assumed resale outcome. Future values for either category cannot be guaranteed.