A single oval cut diamond on a light beige textured surface, with a second blurred diamond in the background. A bottle of Cornish champagne by the shoreline on a beach in Cornwall for a proposal celebration.
Ideas Fest 2026

Complimentary Upgrade

Full Terms and Conditions

Ideas Fest 2026 Lab Grown Diamond Upgrade Offer: Terms & Conditions

  1. This promotion is a special The Cornish Diamond Co. offer created in connection with Ideas Fest 2026. The offer may be claimed by people attending Ideas Fest or those who have been given or shared the promotional link.
  2. The offer entitles the holder to a complimentary 0.5 carat upgrade to the centre lab grown diamond of a qualifying forever engagement ring purchased from The Cornish Diamond Co.
  3. The maximum centre diamond size following the complimentary upgrade is 2.5 carats. For example, a 1 carat centre lab grown diamond may be upgraded to 1.5 carats, a 1.5 carat centre lab grown diamond to 2 carats, and a 2 carat centre lab grown diamond to 2.5 carats.
  4. The complimentary upgrade applies to the carat weight of the centre lab grown diamond only. Diamond shape, cut, colour, clarity, specification and availability will be discussed and agreed as part of the ring design process.
  5. The promotion applies to qualifying lab grown diamond engagement rings purchased directly from The Cornish Diamond Co.
  6. The promotion does not apply to The Yes Ring® itself, wedding rings, other jewellery, proposal experiences, additional diamonds or other stones unless otherwise agreed in writing by The Cornish Diamond Co.
  7. To redeem the offer, the qualifying forever engagement ring must be ordered no later than 10 September 2027.
  8. The offer has no cash value and cannot be exchanged for cash, credit or an alternative discount.
  9. The offer cannot be applied retrospectively to an existing order.
  10. The offer cannot be combined with another discount, promotion or complimentary lab grown diamond upgrade unless agreed by The Cornish Diamond Co.
  11. Only one Ideas Fest complimentary diamond upgrade may be redeemed per qualifying engagement ring.
  12. The Cornish Diamond Co. reserves the right to amend or withdraw this promotion where reasonably necessary. Any amendment or withdrawal will not affect an offer already validly redeemed in accordance with these terms.

Offer expires 10 September 2027.

The Cornish Diamond Co. Ltd
Company No. 16406762