The Protector's Stone

Onyx is a banded variety of chalcedony, most familiar in its solid black form — though true natural black onyx is rare, and most black onyx on the market today is dyed agate or chalcedony to achieve a uniform, deep black.

Gemologically, onyx is described as opaque, with a vitreous to waxy luster — qualities that shape how it catches and carries light once cut. Its colour comes from often dyed; natural material can show banding, and a Mohs hardness in this range is durable enough for regular wear, though it benefits from being set thoughtfully and kept away from harder gems in storage.

Onyx Beyond Black: A Trade Name for Many Colours

Strictly speaking, "onyx" refers to a banded variety of chalcedony — historically, banded agate in black-and-white or other contrasting layers. In the modern jewellery trade, however, "onyx" has also become a general name for chalcedony or agate that has been dyed to a uniform colour, which is why you'll commonly see it offered in a range of shades beyond classic black:

For a buyer, the key distinction is between natural banded agate/onyx (where the colour contrast comes from the stone's own layered growth, as in sardonyx) and the far more common dyed chalcedony sold under the onyx name in a uniform colour. Both have a long place in jewellery, but a reputable seller should be able to tell you which you're buying.

Where Onyx Comes From

Folklore and Healing Traditions

Onyx has held a place in decorative arts, folklore, and crystal-healing traditions across cultures for centuries. Those drawn to this dimension of the stone often choose it for its colour and character as much as for any tradition attached to it — a personal, rather than prescriptive, choice.

How Onyx Is Graded

Quality in onyx is generally assessed across colour, clarity, cut, and carat weight — with colour and overall character typically the dominant factors in value.

What a Lab Report Confirms

A lab report identifies the species, describes colour, and discloses any treatment. The great majority of black onyx on the market is dyed agate or chalcedony — a long-standing, widely accepted practice in the trade.

Natural, Ethical, Jaipur-Sourced

Every onyx in the Paraiso Jewels vault is described accurately as to its natural or treated status on its label. We source through Jaipur's gem market — one of the world's oldest and most concentrated coloured-stone trading centres — and our stones can be verified at GTL Jaipur, the region's principal gem testing authority.

On request, each piece can be accompanied by documentation covering weight, dimensions, and treatment status. If you have questions about the origin or treatment of a specific stone, contact us via WhatsApp or email and we'll provide full details.