Loose Octagon Diamond

$360.00$2,400.00

Please select ALL OPTIONS BELOW to see your price. You won’t be charged on checkout; enter your details to receive a payment link when the Group Buy ends. Seeing is believing – and you can do that here. Don’t let the checkout total scare you – that’s before group buy magic kicks in!
No charge now, final invoice coming soon. See the price drops HERE.

Group Buy Selection
Terms and Conditions/Refund Policy

Please check this box to accept our Ts & Cs/Refund Policy, which you can read below under the 'Group Buy Information' tab.

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  • Pay on invoice when Group Buy finishes
  • Insured Shipping
  • Free Re-sizing
  • Luxury Packaging

Octagonal cuts refer to stones with eight sides, usually with a step-cut faceting style. They’re often square or rectangular in outline, featuring either cropped corners or a bold geometric symmetry that gives them their signature “stop-you-in-your-tracks” look.

Lab-grown diamond offers a clean and sharp appearance in colorless grades (DEF). Its structure works beautifully with step cuts and keeps edge contrast strong. These stones showcase symmetry exceptionally well, making them the best choice if your priority is that crisp, refined geometry.

Every diamond in this collection is IGI certified, with Excellent symmetry, Excellent polish, and Excellent cut grade (where applicable). (The “cut” grade doesn’t technically mean much for fancy shapes, but symmetry and polish absolutely do.)

We’re working with a very specific cutter – a boutique vendor who keeps fewer than 1,000 stones listed across virtual inventories at any given time. He and his team cut for precision over volume, and the level of faceting accuracy they bring to each stone is something we’ve rarely seen. These aren’t mass-produced. Every stone in this project is being custom cut from scratch, to spec, just for you.

This means that if a stone doesn’t meet our visual benchmarks, even if it technically qualifies on paper, it gets re-cut. No exceptions. This happens before the stone ever reaches you, so you’re never left with something that looks different to what you expected.

What you see is what you get – because we’ve made sure it has to be.

Diamond Carat

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Go back to the Octagon Group Buy Home.

Every piece in this group buy is custom made—from the cut of each stone to the final setting. There are no stock items involved. Because our pricing structure depends on group participation and all pieces are made to order, we are unable to offer returns, exchanges, or cancellations once your invoice has been sent.

That said, we’re here to help. If you have any questions before ordering—whether you’re deciding between stone sizes or just need a second opinion—we’re more than happy to support you.

If a piece ever arrives with a verifiable manufacturing defect, we will repair or replace the item. Orders cannot be canceled or refunded under any circumstance once invoiced, including in the case of defects. This does not cover wear, mishandling, or third-party modifications.

Please note:

  • Group buy pricing is conditional on minimum order volumes being reached and can be tracked using the ticker on the Group Buy Main Page.
  • Estimated production and shipping timelines will be communicated post-order window and are subject to change.
  • Payment is due upon invoice and must be received before production begins.
  • You are responsible for providing accurate shipping information.
  • All orders are shipped from the UK.
  • International buyers may be liable for local duties and taxes upon delivery. Please contact us with any queries on tariffs and duties.
  • As each product is bespoke, cancellations and refunds are not permitted after order confirmation, except as required by law.
  • We reserve the right to reject or refund any order at our discretion.
Pricing Tier Commitment

 

You can select one of the following options for your participation in the group buy:

  • Option 1: I want to participate no matter what.

    I’m committed to the group buy and agree to be invoiced at the final tier price, regardless of whether we hit 0–10, 10–19, or 20+ orders.

  • Option 2: I want to participate only if we reach 10–19 or above.

    I would like to participate, but only if we reach at least the 10–19 pricing tier or higher. If the group ends below this tier, I understand that I will not be invoiced and my form will be withdrawn.

  • Option 3: I want to participate only if we reach 20+ orders.

    I would like to participate only if we reach the lowest pricing tier (20+ orders). If we do not reach this tier, I understand that I will not be invoiced and my form will be withdrawn.

Return Policy

 

Every piece in this group buy is custom made—from the cut of each stone to the final setting. There are no stock items involved. Because our pricing structure depends on group participation and all pieces are made to order, we are unable to offer returns, exchanges, or cancellations once your invoice has been sent.

That said, we’re here to help. If you have any questions before ordering—whether you’re deciding between stone sizes or just need a second opinion—we’re more than happy to support you.

If a piece ever arrives with a verifiable manufacturing defect, we will repair or replace the item. Orders cannot be canceled or refunded under any circumstance once invoiced, including in the case of defects. This does not cover wear, mishandling, or third-party modifications.

Terms & Conditions

 

By submitting this order form, I understand and agree to the following:

  • My piece is custom-cut and made to order.

  • My order is a final sale once invoiced.

  • I will only be invoiced once the group buy hits the final pricing tier.

  • My final price will reflect the number of total orders submitted (0–10, 10–19, or 20+).

  • I will have the opportunity to confirm my shipping details before invoicing.

  • I may contact Adamas Studio with any questions before submitting this form.

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