Round Lab Grown Diamond High Set Knife Edge Solitaire Engagement Ring in Silver, 10K, 14K and 18K Gold

A large round lab grown diamond raised high in four long prongs above a knife edge band. The height lets the stone sit proud of the finger, and the peaked band stays thin so the diamond dominates the ring.

At a glance

• Center stone: Round brilliant lab grown diamond
• Carat options: 2, 3, 4 and 5 carat center diamond
• Color and clarity: E color, VVS2 clarity, excellent cut
• Certificate: IGI report for the center diamond, included free
• Setting: High four prong head on a slim basket
• Side stones: None
• Band: Knife edge band, approximately 2 mm at the top
• Metals: 925 sterling silver, 10K, 14K and 18K gold in yellow, rose and white
• Ring sizes: 1.5 to 13, including half sizes
• Made: To order by hand in Surat, India

Height for a larger round diamond

With a bigger center stone, the four prongs grow longer and the head stands taller, which is easy to see in the side photograph. The diamond is lifted well above the band, so from most angles you see a wide face of stone floating over a thin ridge of gold.

Each prong is shaped with a pointed tip that grips the girdle at four evenly spaced corners. In the front views they look like small accents in yellow, rose and white gold, and they leave the edges of the round brilliant almost entirely open to light.

The knife edge band gives the ring its crisp outline. Its top is formed into a ridge, and the sloping sides throw back one sharp highlight, so the shank appears finer than it actually is. That contrast between a slim, pointed band and a generous round diamond is what gives this listing its bold look.

The worn photographs show the ring on a relaxed hand against a lilac top, where the stone catches light even from a side angle. A high set head does sit further from the finger, so it is worth taking a little care with it around door frames and gym equipment, but in return the diamond is shown at its most striking.

Why the round cut

The round cut is the classic 57 or 58 facet brilliant, the most studied cut in jewelry and the one that returns the most light straight back to the eye. It is one of the shapes we are asked for most often, and every round we set is cut to excellent proportions and graded by IGI.

How this ring differs from our other round lab grown diamond rings

This is the largest center diamond in our round knife edge group, and the prongs and head are proportionally taller to hold it. Apart from that scale, the design matches our other round knife edge listings. Compared with our round bezel solitaires, it lifts the diamond higher and leaves the girdle open.

What a lab grown diamond is

A lab grown diamond is a real diamond. It is pure crystallized carbon with the same cubic crystal structure as a mined diamond, grown above ground by one of two methods: chemical vapor deposition, known as CVD, or high pressure high temperature growth, known as HPHT. The Federal Trade Commission in the United States recognizes it as a diamond, and the gem laboratories grade it on the same color, clarity and cut scales used for mined stones.

Here is what that means for a ring you will wear every day:

• Hardness 10 on the Mohs scale. Nothing natural is harder. It will not scratch from ordinary wear and it keeps its polish for a lifetime.
• Refractive index of 2.42 and dispersion of 0.044, identical to a mined diamond. The brilliance and fire are those of diamond because the stone is diamond.
• It tests as diamond. A standard diamond tester reads it as diamond. Only a gem laboratory with spectroscopic equipment can tell whether a diamond grew in the earth or in a laboratory, and that origin is written on the IGI report and laser inscribed on the girdle.
• Traceable origin. A lab grown diamond comes from a known production run rather than a mine, with no mining footprint and a clear chain of custody.

It is not moissanite, not cubic zirconia and not a simulant. Those are different materials that only imitate the look of diamond. The difference between a lab grown diamond and a mined diamond is origin and price, not chemistry, optics or durability.

E color and VVS2 clarity

Every center diamond we set is graded E color and VVS2 clarity, on every metal and every carat weight. E sits in the colorless range, one step below D, and looks icy white to the eye in any metal, including yellow and rose gold. VVS2 means very very slightly included: any inclusions are so small that a trained grader has difficulty finding them under ten times magnification, and nothing can be seen with the naked eye. Cut, polish and symmetry are graded excellent. Accent diamonds are matched to the same E color and VVS2 clarity, so the whole ring reads as one even white.

IGI certificate included free

The center diamond comes with a grading report from IGI, the International Gemological Institute, one of the largest independent diamond grading laboratories in the world, with laboratories in Antwerp, New York, Mumbai and Surat. There is no extra charge for it on any metal or any carat weight. The report records the shape and cutting style, the measurements, the carat weight, the color grade, the clarity grade, the cut, polish and symmetry, and it states in writing that the stone is laboratory grown. The report number is laser inscribed on the girdle of the diamond, so the certificate and the stone can always be matched, and it can be checked online on the IGI website at any time.

Keep the report with the ring. It is the document your insurer and any future valuer will ask for, and it is independent confirmation of exactly what you bought.

Choosing your metal

This ring is made to order in ten metals, so the version you choose is the version we build. There is no plating over a base metal and no filled or bonded gold anywhere in the range.

• 925 sterling silver is the most affordable way to own the design. It is 92.5 percent pure silver, bright white, and it takes a high polish. Silver is softer than gold and it will pick up fine surface marks with daily wear, which most people come to like. It can also tarnish, and a soft polishing cloth brings it straight back.
• 10K gold is 41.7 percent pure gold. It is the hardest and the most scratch resistant of the three gold alloys, which makes it a sensible choice for hands that work. The color is a little paler than 14K.
• 14K gold is 58.5 percent pure gold and it is what most engagement rings sold in the United States are made from. It balances a warm, convincing color against real everyday durability.
• 18K gold is 75 percent pure gold. It has the deepest, richest color and the most weight in the hand. It is also the softest of the three, so it marks a little more readily.

Yellow gold is gold alloyed with silver and copper. Rose gold takes more copper, which gives the warm pink tone and also makes it the hardest of the three colors. White gold is alloyed with palladium or nickel and then finished with rhodium plating, which is what gives it that bright white face. Rhodium wears thin over time and wants redoing roughly every one to two years, which any jeweler can do quickly and cheaply. Every gold ring is stamped with its karat mark.

Choosing your carat size

This ring is offered with a 2, 3, 4 or 5 carat center diamond. Carat is a unit of weight, 0.2 grams, and the size across the face grows more slowly than the weight, so a 4 carat round is noticeably larger than a 2 carat but not twice as wide. The photographs may show a different carat size from the one you choose. The version you select is the one we make.

• 2 carat is the most chosen size. It is unmistakably a statement diamond and still sits comfortably under a glove or a coat sleeve.
• 3 carat is a clear step up in presence and photographs beautifully. This is where most people land when they want the ring to be the first thing anyone notices.
• 4 carat covers the finger generously and suits longer fingers and larger ring sizes particularly well.
• 5 carat is a red carpet diamond, the size people ask about across a room, and one that would be out of reach for most people as a mined stone.

Made to order in our own workshop

Mapple Gems is a family run jewelry workshop in Surat, in Gujarat, India. Surat is where roughly nine out of every ten diamonds in the world are cut and polished, and it is also one of the main centers of lab grown diamond production. We are not a dropshipper and we do not hold finished stock. When your order comes in, a goldsmith casts your metal in your size, a setter places every diamond by hand under a microscope, and the piece is polished, checked against the IGI report and photographed before it leaves us.

Making takes ten to fourteen working days for most orders. Shipping is free worldwide and fully insured, and it is normally three to seven working days once the ring has left the bench. Buying direct from the bench is the reason a ring like this costs what it does here rather than several times more on a high street.

Caring for your ring

Diamond attracts skin oil and hand cream, and a film of it on the underside of the stone is the single most common reason a ring looks dull. Soak the ring for ten minutes in warm water with a drop of mild dish soap, brush gently behind and underneath the stones with a soft toothbrush, rinse and pat dry with a lint free cloth. Once every two weeks is plenty.

Take the ring off before the gym, gardening, swimming pools and hot tubs, and before using bleach or oven cleaner. Chlorine attacks the alloys in gold over time and it will do nothing good to sterling silver. Store it on its own, because diamond will scratch other jewelry. Have the claws checked by a jeweler once a year, which takes two minutes and is usually free. White gold will want its rhodium refreshed every one to two years.

Questions people ask about this ring

How high does the diamond sit?

It sits noticeably above the band on a tall four prong head, as the side photograph shows. That height helps a large diamond catch light from every angle.

Is a high set ring practical for everyday wear?

Yes, with a little care. The prongs are solid and hold the stone firmly, but a taller head is more exposed to knocks than a low setting.

Can a wedding band sit flush against it?

Yes. The raised head leaves room underneath, so a straight wedding band can sit right up against the knife edge band.

Should the prongs be checked?

We recommend a quick check by a jeweler once a year, as with any prong set diamond, to make sure the tips are still snug over the girdle.

Is a lab grown diamond a real diamond?

Yes. A lab grown diamond is chemically, physically and optically the same as a mined diamond: pure carbon, 10 on the Mohs scale, with the same brilliance and fire. The only difference is where it formed, which is why it is graded by the same laboratories on the same scales.

What color and clarity is the center diamond?

The center diamond is E color and VVS2 clarity on every metal and every carat size. E is in the colorless range and VVS2 means no inclusion is visible to the eye, and very hard to find even under ten times magnification.

Does the ring come with a certificate?

Yes. The center diamond comes with an IGI grading report at no extra charge. It confirms the carat weight, color, clarity and cut, states that the diamond is lab grown, and matches the report number laser inscribed on the girdle.

Will a jeweler or a diamond tester say it is a diamond?

Yes. A lab grown diamond tests as diamond on every standard tester because it is diamond. Telling lab grown from mined needs advanced laboratory equipment, and the IGI report already states the origin.

Is a lab grown diamond the same as moissanite?

No. Moissanite is silicon carbide, a different gemstone with more rainbow fire and a lower hardness. This ring is set with lab grown diamond, which is carbon, grades on the diamond scale and tests as diamond.

What ring sizes can I order?

We make sizes 1.5 to 13, including every half size. Choose your size at checkout. If you are unsure, measure a ring that already fits the correct finger, or ask a local jeweler to size you, and remember that fingers run slightly larger in hot weather and late in the day.

Can the ring be resized later?

In most cases yes. Any jeweler can work on a plain section of shank. Resizing is harder where the band is set with stones all the way round, and moving more than about two sizes is better done by remaking the shank. Contact us first and we will tell you what is possible.

How long will it take to arrive?

Every ring is made to order in our workshop in Surat. Allow ten to fourteen working days for making, plus three to seven working days for free insured worldwide shipping. If you have a proposal date, tell us when you order and we will confirm whether we can meet it.

Is the metal solid, or is it plated?

It is solid throughout. 925 sterling silver is 92.5 percent pure silver, and the gold options are solid 10K, 14K or 18K alloy stamped with the karat mark. Nothing in this range is gold plated, gold filled or gold bonded. White gold carries a standard rhodium finish.

Do you offer engraving?

Yes, free of charge. Tell us the wording when you order and we will engrave the inside of the shank. Most people choose a date, initials or a short phrase of up to about twenty five characters.

What is your returns policy?

Returns are accepted within thirty days of delivery on an unworn ring in its original packaging, with the IGI report. Because every piece is made to order, engraved rings are handled case by case. Write to us and we will sort it out.

• All payments are processed securely through PayPal, one of the world's most trusted payment gateways
• Pay with your PayPal balance, or with any major credit or debit card through PayPal's secure checkout
• No PayPal account required — guest checkout available
• PayPal Purchase Protection applies to eligible orders