ChipĬhips are small, shallow openings on the surface of a diamond typically occurring at the culet, girdle edge or facet junction. Be aware that such inclusions accumulate dirt and oil and become darker and more visible with time. Often polishers leave the cavities as completely removing them results in weight loss which has an impact on the sale price.
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The cavity is a small, slightly deep angular opening that is typically caused when a surface-reaching crystal drops out or gets removed during the polishing process. This flaw typically appears at a facet junction when an external force has been applied to the stone and looks like tiny root-link feathers. BruiseĪlthough diamond is the hardest naturally occurring substance on earth, it can have bruises. Such diamonds should be avoided as this effect detracts from a stone’s beauty. A heavily bearded girdle looks grey and fuzzy as if it has been scratched. Bearded GirdleĪs the name suggests, this type of inclusion looks like hair or tiny feathers that extend from the girdle area into the stone and occurs during the improper diamond cutting process. Types of Diamond Inclusions Image © Diamond Buzz. They include abrasion, burn marks, extra facet, lizard skin, natural, nick, pit, polish lines, rough girdle, scratches and surface graining. Sometimes these flaws can be polished down or can be cut to remove. Most of them are imperfect and contain different clarity characteristics, which affect a diamond’s appearance, internal structure, clarity grade and price.ĭepending on their nature, clarity characteristics are classified into diamond inclusions (internal features) and blemishes (external features).ĭiamond inclusions or those internal features that extend into the diamond from its surface include bearded girdle, bruise, cavity, chip, cloud, crystal, feather, grain centre, indented natural, internal graining, internal laser drilling, knot, laser drill hole, needle, pinpoint and twinning wisp. These flaws can be either minor or serious, depending on the way light travels within the stone.ĭiamond blemishes or external clarity characteristics are limited to the surface of a stone. Since diamonds form under extreme heat and pressure and their growth takes between one to three billion years, only rare diamonds emerge in flawless condition. What Are Diamond Inclusions? Image: Dmitrii Stoliarevich / Canva This guide brings together types of diamond inclusions to give you an idea of what they mean and how they affect the stone. The size, quantity, placement and colour of these inclusions determine a stone’s clarity grade and affect its price. Diamond inclusions are clarity characteristics that develop when the diamond is formed deep in the earth.