The Real Difference Between Uncut Diamond And Diamond

An uncut diamond, the stone at the heart of our Uncut Diamond Jewellery, keeps the outline nature gave it, while a cut diamond is faceted to direct light. The difference between uncut diamond and diamond is not one of material, since both are the same natural carbon crystal, but of form, light and craft.

At Jaipur Gems, a house founded in 1974, Polki and faceted diamond pieces alike are designed and made under one roof.

 

Quick Answer: Difference between uncut diamond and diamond

Our guide on what is uncut diamond covers the stone in depth, but the difference between uncut diamond and diamond comes down to what the cutter does, or chooses not to do. A cut diamond is faceted and graded; an uncut stone is left close to its natural form and judged by eye.

• Form: an uncut stone keeps its natural outline and a matte, unfaceted surface; a cut diamond carries precise, planned facets.

• Light: facets return light as brilliance and fire; Polki holds a softer, inward glow.

• Judgement: cut diamonds are graded on cut, colour, clarity and carat; uncut stones are assessed on carat, colour, clarity and natural form.

• Setting: uncut stones are traditionally set in Kundan or Jadau in gold; cut diamonds are usually held by claws, bezels or pavé.

Set side by side, the two read as follows.

What an uncut diamond is, and where it begins

Every diamond begins the same way. Carbon crystallises under extreme heat and pressure, roughly 150 to 200 kilometres beneath the surface, over long geological periods. Much later, deep volcanic eruptions carry those crystals rapidly upward through kimberlite pipes.

An uncut diamond is that crystal kept close to its found state. It is not faceted into a brilliant; at most it is sliced flat and lightly worked, so it keeps a soft, near-matte surface and much of its natural outline. In Indian jewellery, this is the stone at the centre of Polki and Jadau.

In a piece such as the Petal Drip Polki Necklace Yellow Gold Pearl, the Polki is set the Jadau way in 18KT yellow gold: the gold is softened over heat and worked up around each stone's natural edge, with no claw showing, rather than the stone being reshaped to fit the gold. That reversal of priorities is the first real difference between uncut diamond and diamond craft.

Uncut stones are usually chosen for:

• Carat weight, since larger rough stones carry higher value even before any working

• Colour, with clearer, whiter stones valued above heavily tinted ones

• Clarity, as fewer visible inclusions add to a stone's desirability

• Natural form, which decides how the stone sits within its setting

Our journal piece on what is uncut diamond goes into the stone, its names and its history at greater length.

 

What is a cut diamond, and how is it shaped?

A cut diamond begins as the same rough crystal, but the cutter's task is different. The stone is studied, planned, sawn or cleaved, then faceted and polished so that each surface works with its neighbours to return light to the eye.

Faceting has a long history. The earliest point cuts, from around the fourteenth century, simply polished the crystal's natural faces, and the modern round brilliant, with its calculated proportions, was refined in the early twentieth century.

The cutter accepts a real loss along the way. Shaping a rough crystal into a finished, faceted stone removes a significant part of its weight, and that loss is part of what a cut diamond's price reflects.

In the Floral Whispers Diamond Necklace White Gold Emerald, 613 cut diamonds are set in 18KT white gold alongside emeralds, with pink sapphires held at the margins. The emeralds are matched against the diamonds for tone before a single stone is set.

Common shapes in cut diamonds include:

• Round brilliant, the most familiar shape, cut for maximum return of light

• Oval and pear, elongated forms that lend length to a finger or neckline

• Emerald cut, a step cut with long, open facets that rewards high clarity

• Princess, a square, modern form with crisp corners

Those drawn to that precision will find it across our Diamond Jewellery, where the facet, rather than the outline, leads the design.

 

The difference between uncut diamond and diamond in form and light

This is where the two part ways most clearly. A faceted diamond behaves as a system of mirrors: light enters through the top, reflects off the angled facets below and leaves again, broken into brilliance and flashes of colour.

An uncut diamond has no such architecture. Its natural, matte surface returns little light, so the stone reads as a subdued, inward glow rather than a play of flashes.

Traditionally, a foil placed behind the stone in a closed setting lends Polki warmth and depth. 

The Luxe Block Diamond Bangle Yellow Gold shows the faceted side of this contrast, with 25 cut diamonds set in 18KT yellow gold, returning light as the wrist moves.

Read in the hand, the difference between uncut diamond and diamond comes down to five things:

• Outline: natural and irregular, against symmetrical and planned

• Surface: matte and natural, against dozens of polished facets

• Light: a held glow, against returned brilliance

• Inclusions: often visible to the eye in an uncut stone, and accepted as part of its natural character

• Colour: uncut stones range from milky white to yellow, brown or grey, while cut diamonds are graded on a D-to-Z colour scale

Pearls share the same quiet register of light as uncut stones, which is why the Petal Drip Polki Necklace Yellow Gold Pearl pairs the two so naturally.

 

How an uncut diamond and a cut diamond are judged

A cut diamond is graded against a shared language. The 4Cs, cut, colour, clarity and carat, were set out by the Gemological Institute of America to describe faceted diamonds, and a grading report records each one.

Clarity alone runs across eleven grades, from Flawless to Included. Our diamond clarity chart sets those grades out one by one, with what each means for the stone.

An uncut diamond sits outside that system, which was built around faceted stones. Instead, it is judged by the trained eye of the jeweller: its carat weight, colour, clarity and natural form.

Questions worth asking about any uncut diamond piece:

• The BIS hallmark on the gold, which confirms its purity

• The approximate diamond weight across the piece

• Whether the setting is open or closed and foil-backed

• Certification, particularly for larger or higher-value stones

• The craftsmanship of the gold work around each stone

For a broader view of authentication, our guide on how to identify diamond explains why a professional assessment carries more weight than any quick check at home.

 

Uncut diamond settings vs cut diamond settings

How a stone is held says as much about it as how it is cut. A cut diamond is usually secured by metal claws, a bezel rim or rows of small beads in pavé, each designed to let as much light as possible reach the facets.

Polki asks for a different discipline. In Kundan setting, highly refined gold is pressed around the stone, layer by layer, until it is held without claws.

Jadau is the wider craft of embedding stones into gold in this way, often with meenakari enamel on the reverse. Our karigars carry this craft into smaller forms across the Uncut Diamond Rings for women, where several designs set Polki and cut diamonds together in a single ring.

What the setting tells you:

• Claw and bezel settings are chosen for cut diamonds, leaving the facets open to light

• Closed Kundan settings are traditional for Polki, with foil behind the stone

• Open settings let light pass through the stone from behind, for a lighter, more contemporary feel

• A meenakari reverse is enamel work behind a Jadau piece, seen mostly by the wearer

The Luxe Block Diamond Bangle Yellow Gold shows the other path, where the measured form of the gold answers the order of the faceted stones.

 

What shapes the value of an uncut diamond and a cut diamond

Price follows a different logic for each. A cut diamond's value is built largely from its grades: a stone that is larger, more colourless, cleaner and better cut is worth more, and those grades are what buyers compare.

An uncut diamond is valued less through grades and more through the piece as a whole. Per carat, Polki stones are generally priced below faceted diamonds of similar weight, but a finished Polki piece also carries the weight of its gold and the hours of hand-setting behind it.

Factors behind the price of a Polki piece:

• The carat weight, colour and clarity of the uncut stones

• The purity and weight of the gold

• The intricacy of the Kundan or Jadau work, including any meenakari

• Pearls, emeralds or other gemstones set alongside

• Rarity and origin, as certain natural characteristics carry a premium

For a cut diamond, the grades come first, and the diamond clarity chart is a useful reference for what each step in clarity means.

Resale follows the same split. A cut diamond holds a more predictable resale value because recognised grading applies, while an uncut diamond piece is valued as a whole and is more often kept as an heirloom than resold.

Documentation matters before any purchase: a grading report for a significant cut diamond, and a BIS hallmark on the gold of any piece. Those two records answer most questions about the difference between uncut diamond and diamond value.

Uncut diamond or cut diamond: which one is right for you

Our view is simple. Neither stone is better; each is the better answer to a different question.

A cut diamond suits those who value precision and stones that can be graded, matched and documented. The Floral Whispers Diamond Necklace White Gold Emerald belongs to that register: a high jewellery piece in which each of its 630 settings was cut and closed by hand.

An uncut diamond suits those who value continuity. Bridal and heirloom pieces meant to pass from one generation to the next have long been made with Polki and Jadau, and they carry that history into each ceremony.

A cut diamond tends to suit:

• Everyday and workwear jewellery

• Engagement rings and solitaire pieces

• Buyers who want graded, documented stones

An uncut diamond tends to suit:

• Weddings and family ceremonies

• Pieces bought with an heirloom in mind

• Buyers drawn to handcraft over geometry

For a first Polki piece, a ring is often the gentlest beginning, and our Uncut Diamond Rings for women carry the craft at a quieter scale than a bridal necklace.

 

Caring for uncut diamond and cut diamond jewellery

Diamond is the hardest natural material, yet the settings around it are not equally robust. Care follows the setting more than the stone, and here too the difference between uncut diamond and diamond shows.

• Polki pieces in Kundan or Jadau settings are best kept away from water and perfume, since moisture can dull the foil behind the stone

• A soft, dry cloth is enough after wearing; ultrasonic cleaners are unsuitable for foil-backed and enamelled pieces

• Cut diamond jewellery can be cleaned in lukewarm water with mild soap and a soft brush, then dried well, though pieces set with emeralds are better wiped than soaked

• Separate pouches keep cut diamonds from scratching softer stones and gold

• A yearly check by a jeweller keeps claws and settings secure

If a stone's authenticity is ever in question, our guide on how to identify diamond explains why a professional assessment remains the final word.

A closing note on uncut and cut diamonds

Both stones begin as the same crystal; what separates them is the hand that meets them afterwards. The difference between uncut diamond and diamond is, in the end, a difference between two disciplines, one of geometry and one of continuity.

Jaipur Gems has worked in this space since 1974, a second-generation family house whose Polki, Jadau and Kundan pieces are designed and made in-house. Over fifty years on, both the faceted stone and the uncut one have a place in the house.

For the precision of the facet, our Diamond Jewellery holds the faceted side of the craft. The stone kept close to its origin asks for a slower look.

For that, the Uncut Diamond Jewellery is the place to begin.

 

Frequently asked questions about uncut diamond and cut diamond

Are diamonds worth more, cut or uncut?

A cut diamond usually commands more per carat, as cutting and grading add value. A Polki piece is valued for its stones, its gold and the hand-setting behind it.

What are the four types of diamonds?

Scientists classify diamonds as Type Ia, Ib, IIa and IIb, by nitrogen or boron content. Most natural diamonds are Type Ia; Type IIb stones contain boron and can appear blue.

Are uncut diamonds worth anything?

Yes. An uncut diamond is valued by carat, colour and clarity, and in Polki and Jadau by its gold work. Resale is less standardised, so such pieces are usually kept as heirlooms.

Is uncut diamond expensive?

Per carat, uncut diamonds are generally more accessible than faceted ones. A finished piece's price depends on stone size, gold weight and the intricacy of its Kundan or Jadau work.

Which is better, a diamond or an uncut diamond?

Neither is better outright. The difference between uncut diamond and diamond is one of purpose: cut stones for precision and daily wear, uncut for bridal and heirloom pieces.