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Book Appointment

Engagement rings · 2026 book

The workshop behind the window.

Engagement rings in every setting and centre shape, in four metals — built to your spec around our own certified diamonds, natural or lab-grown. Draw it here, send us the spec, and a dimensioned CAD render comes back within 24 hours.

Every ring we ship carries a spec code — including the one above.

Build a ring See the catalog
24-hour CAD render 10,000+ certified diamonds 4–6 day build No minimum order
Couple embracing, three-stone engagement ring with pear brilliant centre and tapered shoulders in 18K white gold GD-ER-TH-PE-200-18W Three stone · pear centre
Photographed, then redrawn — same spec, same file 2.00 ct pear centre · tapered shoulders 0.62 ct · 18K white · shank 1.9 mm
Client build
New York
IGI / GIA certified In-house CAD, casting, setting, finishing 24-hour CAD render NY + LA showrooms Unbranded by default
  1. 1 Choose the setting Made to order · any metal
  2. 2 Choose the centre Natural or lab-grown · IGI / GIA certified
  3. 3 We build it CAD in 24 hours · ring in 4–6 days

The build desk

Draw it, then send us the spec.

Pick a shape, setting and metal
The drawing and the spec code
update as you go

Centre shape Oval

Setting Hidden halo

Metal 18K white

Centre weight 1.50 ct

1.50

Your setting

Your centre diamond

Front elevation

—
GD-ER-HH-OV-150-18W Hidden halo · oval centre · 1.50 ct · 18K white Accent weight approx. 0.28 ct total · shank 1.9 mm

The drawing above is a live spec, not a photo — it redraws with every choice you make, and the finished ring is cast to the dimensioned CAD render we send after your build is confirmed. Prices are quoted to spec, not listed. Metal weight, accent count and centre availability all move the number, so we price each build against the diamond you choose rather than publishing a rate card. Send the spec and you'll have a quote the same working day.

The ring collection

Every ring we build, in one place.

Made to order in your metal
Centre diamond quoted against
live inventory

Trade catalog

See every ring we build.

Enter your work email to open the full engagement ring catalog.

Every ring is made to order in your choice of metal and centre diamond, natural or lab-grown, in finger sizes 3–13 including halves at no surcharge. Prices are quoted to spec, not listed: the centre diamond is priced against live inventory the same working day, because colour, clarity and cut all move the number. Every ring ships unbranded unless you ask us to stamp your own mark.

Centre diamonds

The diamond comes from our own floor.

Regular and antique cuts
tap a shape to load it into the build desk

Regular cut

Antique cut

Natural and lab-grown, IGI or GIA certified, D–J and VVS–SI. Because the centre and the mounting come from the same house, the seat is cut to the diamond rather than the diamond hunted to fit a stock head.

Inventory

In-house10,000+ certified diamonds

Certification

IGI / GIAReport with every centre

Minimum order

NoneSingle rings welcome

Showrooms

NY + LA36 W 47th · 607 S Hill

Real builds, worn

Off the CAD, onto the hand.

Every setting in this catalog is built to ship — cast, set and finished in our own workshop, then worn just like this.

From spec to ring

One design, one roof.

CAD, casting, setting
and finishing all happen
in our own workshop
Step one

The spec

Your client's idea, written down

Shape, setting, metal, finger size and a centre from our floor — or your own diamond sent in. A sketch or a screenshot works just as well.

Step two

The render

Dimensioned CAD in 24 hours

Every measurement on the drawing, changes turned around in hours. Nothing is cast until you sign the render off.

Step three

The ring

Cast, set and finished

Built to the approved render, quality checked against it, then dispatched unbranded — ready to hand straight to your client.

Guides

Before you send the spec.

General reference for
buyers new to the book
Five loose diamonds in different shapes

Shape guide

How round, oval, cushion and the rest wear differently on the hand, and which settings suit each.

See the shapes →
Ring bands in four metal tones

Metal guide

18K white, yellow, rose and 950 platinum — how each wears, and how each photographs in a listing.

Compare in the desk →
Ring sizing mandrel and sizer tools

Sizing guide

US 3–13 including halves, no surcharge. What to send us if your client's size isn't confirmed yet.

Ring size chart →
Loose diamond beside a jeweler's loupe

IGI vs. GIA

Both are recognised gemmological labs. Every Guru Diam centre ships with a report from one or the other.

See certification →

Order to doorstep

Four to six working days, from approved CAD.

No minimum order
One ring runs the same
route as fifty
  1. The spec

    The spec

    Shape, setting, metal, finger size. Build it on the desk above and send us the code, or write it on an email — both work.

  2. Within 24 hours

    The drawing

    A dimensioned CAD render comes back inside 24 hours. Revisions are free and unlimited until the drawing is right.

  3. On approval

    The centre

    Pulled from 10,000+ certified diamonds in stock, natural or lab-grown. The IGI or GIA report travels with it. Send your own diamond instead if you'd rather.

  4. Casting

    Cast and cleaned

    Grown, cast, filed back and pre-polished on our own benches. Nothing leaves the building to get made.

  5. Setting

    Set by hand

    Centre seated, accents cut in and tightened, then the final polish. One setter carries the piece the whole way.

  6. 4–6 working days

    Out the door

    Checked under the loupe, photographed for your records, insured courier. Plain packaging, no stamp of ours anywhere on it.

Delivered

It goes out under your name.

Unbranded by default. Your box, your card, your mark inside the shank if you want one. Nobody your client meets ever hears ours.

GD-ER-TH-PE-200-18W · built for a New York retail partner · shipped plain

Request a quote

Send the spec. We build the rest.

Trade accounts only
Quote back the same
working day

Anything in your quote list is carried into the message below. Add a finger size, a deadline or your own diamond details and we'll price it against live inventory.

Turnaround

4–6 daysFrom approved render

CAD render

24 hoursDimensioned, free with quote

Inventory

In-houseCentre and melee together

Branding

UnbrandedYour mark on request

We reply from a person, not an autoresponder. NY 9–6 ET, LA 9–6 PT.

Questions

Asked by the trade.

Do you sell to the public?
No. Guru Diam sells to jewelers, retailers, designers and manufacturers only. Open a trade account and you'll see specifications, pricing and live centre diamond availability.
Is there a minimum order?
There isn't. A single ring is a normal order here, and it moves through the same workshop and the same checks as a repeat programme.
Can I send my own centre diamond?
Yes. Send the diamond with its report and we'll cut the seat to it. If you'd rather we supply, the centre comes from our own inventory with an IGI or GIA report.
How long does a ring take?
A dimensioned CAD render comes back within 24 hours of the spec. Once you approve it, the finished ring takes 4–6 working days through casting, setting and finishing.
Do the rings carry your name?
Only if you want them to. Rings ship unbranded and unmarked by default. We'll stamp your own mark inside the shank on request.
Lab grown or natural?
Both, in every shape shown here. The setting is identical either way — the choice only changes the centre and the certificate that travels with it.
Can you match a design I already have?
Send a photograph, a sketch or a competitor's page and we'll draw it. The CAD render is where you check it against what your client asked for, before anything is cast.

0 rings on your quote list

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