The Gem of Mars

Coral is an organic gemstone formed not by geological processes but by living organisms — the calcium carbonate skeletons secreted over years by colonies of tiny marine coral polyps. Precious (gem-quality) coral is a different material entirely from the reef-building corals protected in shallow tropical waters; it grows slowly in deep, cold ocean waters and has been prized for jewellery for thousands of years.

Gemologically, coral is described as opaque, with a waxy to vitreous luster — qualities that shape how it catches and carries light once cut. Its colour comes from organic carotenoid pigments within the calcium carbonate skeleton, and its relative softness means it's best suited to pendants, earrings, or decorative pieces rather than rings worn daily.

Where Coral Comes From

Italian Coral: Torre del Greco

For over 200 years, the small town of Torre del Greco, near Naples, has been the world's centre of coral carving and craftsmanship, working Mediterranean red coral (Corallium rubrum) harvested from the waters around Sardinia, Sicily, and North Africa into cameos, beads, and jewellery. Mediterranean coral typically shows a rich, warm red, sometimes with pink or salmon tones. Due to centuries of harvesting and modern conservation measures restricting Mediterranean coral fishing, genuinely Italian-sourced precious coral has become increasingly scarce — much of what is sold as "Italian coral" today refers to material carved or finished in Italy using deep-water coral from other sources, which is worth clarifying when buying.

Japanese Coral: Aka, Moro & Boke

Deep-water precious coral harvested from the seas around Japan and Taiwan is traditionally classified into named varieties based on colour:

Coral in India: The Moonga Trade

While India produces no coral of its own, it is one of the world's most important trading and cutting centres for coral specifically because of Moonga's role as Mars's gemstone in Vedic astrology (see the Vedic section below) — red coral is among the most commonly recommended Navratna gems, driving consistent demand. Raw coral sourced from Mediterranean, Japanese, Taiwanese, and other deep-water fisheries is imported and cut into beads, cabochons, and ring stones largely through Jaipur's gem trade to meet this demand.

Moonga — Mars's Stone

In Indian Vedic astrology (Jyotish Shastra), coral is known as Moonga and is associated with Mangal (Mars).

How Coral Is Graded

Quality in coral 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. Lower grades of coral are sometimes dyed to even out or deepen colour, and reconstituted/bonded coral (made from fragments) exists in the market — both should be disclosed, as natural, untreated precious coral of good colour and size carries a significant premium.

How Size Affects Coral Pricing

Coral pricing behaves differently from most faceted gemstones, where price tends to scale roughly with the cube of size (carat weight). Because precious coral grows as branching skeletons with a natural central hole and irregular surface, larger pieces of clean, even-coloured solid coral are disproportionately rare — a coral branch large enough to yield a big, hole-free bead or cabouchon without internal cracks or white spots is far less common than the small branches that yield small beads.

As a result, price per gram or per carat tends to rise steeply — not linearly — with size: a set of small coral beads (a few millimetres) may be quite affordable, while single beads or cabochons above roughly 8–10mm in clean, even colour can command a significant premium, and pieces above 15–20mm in fine, untreated colour are genuinely rare and priced accordingly. This is compounded by international conservation restrictions on precious coral harvesting (particularly Mediterranean coral), which have reduced new supply over time. When evaluating coral jewellery, size, evenness of colour, and the absence of visible holes, cracks, or white "worm holes" are the main factors that determine where a piece sits on this curve.

Natural, Ethical, Jaipur-Sourced

Every coral 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.