{"id":529219,"date":"2026-01-12T14:01:55","date_gmt":"2026-01-12T03:01:55","guid":{"rendered":"https:\/\/www.australiandiamondbrokers.com\/blog\/?p=529219"},"modified":"2026-04-06T15:15:34","modified_gmt":"2026-04-06T05:15:34","slug":"the-difference-between-cratonic-and-non-cratonic-diamond-sources","status":"publish","type":"post","link":"https:\/\/www.australiandiamondbrokers.com\/blog\/the-difference-between-cratonic-and-non-cratonic-diamond-sources\/","title":{"rendered":"The Difference Between Cratonic and Non-Cratonic Diamond Sources"},"content":{"rendered":"

\"Woman

When people shop for diamonds, the conversation usually revolves around cut, colour, clarity and carat. But behind every diamond is a geological story that can stretch back billions of years. That story begins deep within the Earth and depends heavily on whether a diamond comes from a <\/span>cratonic<\/b> or <\/span>non-cratonic<\/b> source.<\/span><\/p>\n

Understanding the difference is not just a science lesson. It helps explain why certain diamonds are rarer, why some regions produce consistently high-quality stones, and why Australia holds such a unique place in the global diamond story. For buyers who value provenance, ethics and rarity, this knowledge adds an extra layer of meaning to a diamond purchase.<\/span><\/p>\n

In this guide, we will break down the differences in plain English and explore why it matters to Australian diamond buyers.<\/span><\/p>\n

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What Is a Diamond Source?<\/b><\/h2>\n

Before we dive into cratonic and non-cratonic origins, it helps to understand what geologists mean by a diamond source.<\/span><\/p>\n

Diamonds do not form where they are mined. They crystallise deep in the Earth\u2019s mantle, often more than 150 kilometres below the surface. Volcanic activity then carries them upward in rare, fast-moving eruptions, eventually depositing them closer to the surface where humans can find them.<\/span><\/p>\n

A diamond source refers to the geological environment in which diamonds originally formed and the type of crust and mantle that hosted them for billions of years.<\/span><\/p>\n

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Understanding Cratons<\/b><\/h2>\n

What Is a Craton?<\/b><\/h3>\n

A craton is the oldest and most stable part of the Earth\u2019s continental crust. These regions are geological survivors. They have remained largely unchanged for billions of years and form the ancient cores of continents.<\/span><\/p>\n

Cratons are thick, cool and chemically stable, which makes them ideal environments for diamond formation and preservation over immense periods of time.<\/span><\/p>\n

Why Cratons Are Ideal for Diamonds<\/b><\/h3>\n

Diamonds require very specific conditions to form:<\/span><\/p>\n