NEW YORK LONDON TOKYO DUBAI HONG KONG
The same diamond, the same certification — at the price it always should have been.
← The Signature Collection · Rings View All Rings →

La Costanza

The Signature Collection
Lune Royale
Ready to Ship — The Actual Piece
La Costanza — in stock, ready to ship
Premium Lab-Grown Diamond · IGI Certified · Part No. 2N-KDA-YFMTPS
This is the actual piece, ready to ship from our New York vault. It is set with a 3.5 ct Oval-cut premium lab-grown diamond (3.5 ct total diamond weight), in 14K Two-Tone Gold. It is IGI Certified and ships exactly as photographed — the same stone, the same grade, no substitution. Part No. 2N-KDA-YFMTPS.
StonePremium Lab-Grown Diamond
ShapeOval
Centre3.5 ct
Total3.5 ct
CertificationIGI Certified
◆ Ships Today ◆ IGI Certified ◆ Insured Delivery ◆ 30-Day Returns ◆ Hand-Finished Velvet Box ◆ Premium Lab-Grown Diamond
Every 2N piece is IGI-graded and insured in transit — the exact stone, the exact grade, direct from our New York vault.
A Premium Lab-Grown Diamond — the same physical, chemical and optical composition as a natural diamond, with identical fire and hardness. Hand-built by our Master Artisans.
$92/mo
$2,208$7,096 Save 69%
24-Month Financing — or 6 Months · 0% Interest via PayPal
Subject to credit approval. Credit provided by PayPal.
Ring Size
Not sure of your size? Your concierge can help →
Buy It Now · Pay LaterShips insured · 0% for 6 months
The actual piece — IGI-certified fine jewelry, ready today, shipped insured in a hand-finished velvet box.
Our Vision
La Costanza
Created from Scratch — Not Repurposed

“She stopped mistaking restlessness for aliveness, and learned the strength of staying.”

Our recreation of this piece
is being finished by hand
Premium Lab-Grown Diamond · Hand-Finished 2N Creation · Part No. 2N-DIA-YFMTPS
StonePremium Lab-Grown Diamond
ShapeOval
Centre3.5 ct
Total3.5 ct
CertificationIGI Certified
A custom, limited-edition creation — only a select number of this design are ever made. Built from scratch by our Master Artisans, never repurposed. Please allow 10 days, as each piece is made to order for you.
◆ Master-Artisan Finished ◆ IGI Certified ◆ Premium Lab-Grown Diamond ◆ New York Vault ◆ Insured Delivery ◆ Velvet Box
A Premium Lab-Grown Diamond — the same physical, chemical and optical composition as a natural diamond, with identical fire and hardness. Hand-built by our Master Artisans.
$124/mo
$2,967$7,096 Save 58%
Bespoke — made to order, only for you.
24-Month Financing — or 6 Months · 0% Interest via PayPal
Subject to credit approval. Credit provided by PayPal.
Metal — 14K White Gold
Ring Size
Not sure of your size? Your concierge can help →
Buy It Now · Pay LaterShips insured · 0% for 6 months
IGI-certified piece with Verify — our Master-Artisan creation, shipped insured in a hand-finished velvet box.
Your Private Concierge (207) 679-0656 concierge@2ndiamonds.com
IGI CertifiedInsured Delivery30-Day ReturnsVelvet Box
The Diamond, and Why It Was Chosen

La Costanza

The La Costanza is built around a 3.5-carat oval-cut lab-grown diamond (3.5 ct total), set in 14K Two-Tone Gold and IGI-certified — independently graded, permanent, internationally recognised. It is a lab-grown diamond: atom-for-atom identical to a mined stone in fire, hardness and brilliance — the only reason a diamond of this grade reaches you at this price.

The oval is the round brilliant elongated — the same fire, a longer line on the hand, and the quiet choice of those who know diamonds well.

The oval is the round diamond's older, steadier sister. It keeps all of the round's fire but stretches it long, so the light runs the full length of the stone and never quite ends. Jewelers reach for it when they want brilliance that reads as endurance rather than sparkle for its own sake. La Costanza — Constancy — is a ring built on exactly that quality: a long oval diamond standing tall in its setting, light with no beginning and no end, for the woman who stopped mistaking restlessness for aliveness and learned the quiet strength of staying. If the steady, unbroken glow of this stone has already reached you, you already understand her.

At its heart is an oval-cut diamond, colorless in the rare D-to-F range — the round brilliant drawn long, its facets carrying fire from one end to the other in an unbroken sweep. It is the cut that looks like something that lasts.

It is worked in 14-karat white gold, mirror-polished so the metal reads clean and enduring and the oval glows steady and cool against the dark.

Her Story

“She stopped mistaking restlessness for aliveness, and learned the strength of staying.”

It stands tall on a cathedral setting, the center stone lifted clear on fine prongs above an open gallery, so the diamond seems to rise rather than merely sit. Seen from the side, the ring has architecture — it holds itself up the way a woman does when she has decided to stand her ground.

The band climbs to it set with fine pave diamonds along both shoulders and a hidden line of stones tucked beneath the gallery, so light gathers from every side and lifts the great oval from within — the strength underneath the strength you can see.

And understand exactly what it is: laboratory-grown diamonds of certified, genuine brilliance. The same carbon, the same fire, the same forever as any stone taken from the earth — chosen because a woman can wear constancy without asking the world to give anything up for it.

We designed La Costanza from a blank page and raised the oval on its gallery until the whole ring stood tall and sure. It imitates no house and defers to none. Its proportions were refined until the stone read as endurance and the cathedral held it high without looking heavy — the hardest thing to achieve when a setting must feel like architecture and still disappear beneath the light.

Here is the truth the great houses keep behind glass: an oval of this colour and finish, raised on hand-set pave, carries a price that lowers voices. Ours does not. It was set, deliberately and for good, beneath what they would ask — because the strength of staying should never come at a ransom.

Picture it on your hand across the long ordinary years, catching the light the same way in the tenth year as the first; picture it on the day you chose to stay in the hard, worthwhile thing instead of chasing the next bright distraction. In both, it does the same quiet thing — it honors the strength that does not announce itself.

There is a truth you have been living your way toward — that you spent too long mistaking restlessness for aliveness, sure that the next new thing was where the living was, when the deepest strength you have was always the strength to stay, to hold, to see something through. La Costanza is that strength, worn on the hand. Not asked of you by anyone. Chosen, and kept, by you.

The oval flatters every hand and every age; it is timeless, elongating, and endlessly classic, and it will glow just as steadily in thirty years as it does tonight — the whole point of it. True constancy, like a woman who learned to stay, only proves itself with time.

Wear it to the milestones of a life you built by staying, or wear it on an ordinary Tuesday because you decided steadiness was its own kind of luxury. Both are true. The woman who values constancy on an ordinary Tuesday has understood the thing the ones still chasing the next bright thing have missed.

Every La Costanza is finished by hand and held to one question before it may leave us: would a stranger's eye rest on the long steady glow of the stone across a crowded room and feel that it meant permanence. If the answer is not immediate, it stays. That standard does not move.

When it is yours, wear it home tonight on your terms and pay over time — Buy Now, Pay Later, with financing built for a life already in motion, so nothing this enduring is ever kept waiting by a calendar.

La Costanza does not chase the next bright distraction. It holds one steady, unbroken light — tall and sure — on the hand of the woman who stopped mistaking restlessness for aliveness and learned the strength of staying. Bring her home.

This is the piece you keep talking yourself out of. Wear it now and pay over time — 0% for six months, or up to twenty-four — and let the woman in the mirror finally have the one thing she keeps setting aside for everyone else. You earned it long before you found it.

The 2N Standard

Materials, Certification & Delivery

Every 2N diamond is finished by hand by our Master Artisans in New York — cutters and setters whose training spans decades, and whose rule is absolute: nothing leaves the bench unless it would survive a side-by-side comparison with anything in any showroom in the world.

These are the same diamonds we have supplied to wholesalers and jewelry houses for years — the exact grade, the exact craftsmanship. Now they reach you directly, at the price the trade pays, with no showroom, no middleman, and no markup standing between you and the stone.

That is the whole of the 2N standard: only the finest diamonds earn our name, set into pieces built to be owned for a lifetime and handed down — delivered to your door, insured, in a hand-finished velvet box that no one will open but you.

Materials14K Two-Tone Gold, set with a Premium Lab-Grown Diamond · 3.5 ct total.
CertificationIGI Certified — independently graded, permanent, internationally recognised.
DeliveryShipped fully insured in a hand-finished velvet box, tracked to your door.
Assurance30-day returns · Buy Now, Pay Later · your private concierge on call.
$92/mo$2,208 Boutique $7,096 · Buy Now, Pay Later
◆ The 2N Assurance ◆
Every Piece, Guaranteed
IGI Certified
Independently graded and permanently registered — the exact stone, the exact grade, documented before it reaches your hand.
Insured · 10-Day Delivery
Shipped fully insured and tracked to your door in a hand-finished velvet box, typically within ten days.
30-Day Returns
Live with it. Be certain. If it is not everything you pictured, return it within thirty days — simply, no questions.
Lab-Grown Provenance
Atom-for-atom identical to a mined diamond in fire, hardness and brilliance — an origin you can trace and stand behind.
Master-Artisan Made
Finished by hand in New York by cutters and setters whose standard is that nothing leaves the bench unless it is flawless.
Private Concierge
One dedicated specialist from first question to final delivery — reachable directly, whenever you need them.