Natural diamonds are far older than the rings they are set in. The Gemological Institute of America describes them as having formed deep in the earth over a very long span of geological time. On its diamond origin page, GIA gives a range from 90 million to 3 billion years ago. In a 2024 article in Gems and Gemology, GIA researchers describe dated examples from about 90 million years old through to 3.5 to 3.3 billion years old. A jewellery report does not tell you the age of a particular stone, and we would never claim an age for a diamond from a photograph.
What GIA says about when diamonds formed
Those published ranges matter because they are not a single date. Some diamonds are extraordinarily old. GIA's 2024 review describes the oldest dated examples, 3.5 to 3.3 billion years old, as coming from northern Canada, and it also records much younger dated ages, around 90 million years, from South Africa. It notes that many deposits contain more than one population of diamonds, formed at different times. The scientific point is simple enough for a brief: natural diamonds grew in the mantle, then later travelled towards the surface, and their ages can differ widely.
GIA also writes, on its main diamond page, that most diamonds formed more than a billion years ago, deep in the earth's mantle. We use that as general context, not as a promise about the stone in any one ring.
Age is not a quality grade
Cut, colour, clarity and carat weight describe how a diamond looks and how it is measured. Geological age is a different question, answered only by specialist dating of certain inclusions, which is not part of a standard grading report. That is why two beautiful diamonds can share similar grades and still have formed at very different times, without that difference showing in the hand.
It is also different from dating a diamond by the style of its cut. Old cuts can hint at when a stone was polished, which is a later chapter in its life. Our guide to how to date a diamond by its cut is about that workshop history, not about how many millions of years ago the crystal grew.
How this sits with laboratory grown diamonds
Laboratory grown diamonds are made in a laboratory in a comparatively short time. They can match a natural diamond in composition, but they do not carry a geological age measured in millions or billions of years. If the history of a natural stone matters to you, that is a reason to choose one. If you are choosing on appearance, the 4Cs and a careful look at the stone still come first. Our guide to what natural diamonds are sets out that distinction in more detail.
We can source natural and laboratory grown diamonds, and we label each clearly. We work by video consultation and message. Nothing is made until you approve the design and the stone in writing. A 70 percent deposit is paid then, making time is 5 to 6 weeks, and the ring is UK hallmarked before insured, tracked FedEx delivery. If you would like to talk through a stone, get in touch or browse the diamonds we can source.
Frequently asked questions
How old are natural diamonds?
GIA describes natural diamonds as having formed over a very long span of the earth's history. On its diamond origin page it gives a range from 90 million to 3 billion years ago, and in a 2024 Gems and Gemology article it describes dated examples from about 90 million years old to 3.5 to 3.3 billion years old.
Are all natural diamonds the same age?
No. GIA notes that diamonds have formed at different times, and that a single deposit can contain more than one age population. A jewellery grading report does not give the age of an individual stone.
Can you tell the age of a diamond from a report?
A standard grading report describes quality, not geological age. Age dating is a specialist scientific process and is not part of ordinary diamond grading. We would not claim an age for a particular stone from its report or from a photograph.
Are laboratory grown diamonds the same age?
No. Laboratory grown diamonds are made in a laboratory in a comparatively short time. They can have the same chemical composition as a natural diamond, but they do not have a geological age measured in millions or billions of years.