Where can I buy a lab-grown engagement ring online with delivery to Portugal?

Two reasons not to. First, you cannot try your ring on before ordering — it does not exist yet, because every ring is made after you order it. No showroom. A personal meeting in Prague is possible by arrangement. Second, it takes weeks, not days: production comes first, then delivery.

Reasons people do it anyway. The ring is made to your specification — gold colour, carat, shape, size, engraving — and the price forms live on the page. Every centre diamond above 0.30 ct carries an IGI or GIA report, its number laser-inscribed on the stone. Prague is inside the EU: no customs, no import duty, and EU consumer law applies just as it does with a Portuguese seller.

And the company is checkable before you spend a euro: Kove Jewelry s.r.o., IČO 27484611, is in the Czech business register (the company dates to 2005; I have owned and curated it since 2023) and is registered with the Czech Assay Office (Puncovní úřad), registration No. 15432.

Rings are made to order by a small network of partner ateliers, inspected by me personally, and shipped insured from Prague.

1. Payment, then production. Solitaire and three-stone rings: usually 10–28 business days; pavé, halo and hidden-halo designs: 28–35. If your centre stone is already in local stock, the 10-day end applies — ask before ordering if you have a date.
2. Inspection and dispatch. Each ring is checked against its specification and certificate in Prague, then ships by insured, tracked courier with signature on delivery. You receive the tracking code by e-mail.
3. Transit to Portugal. 3–7 business days after dispatch. Door to door: 13–35 business days (about 3 to 7 weeks) for a solitaire or three-stone ring; 31–42 business days (about 6 to 8½ weeks) for pavé and halo designs.
4. Taxes and customs: nothing to pay on delivery. Both countries are EU member states — no customs clearance, no import duty. Kove is registered under the EU One-Stop-Shop (OSS) VAT scheme: your invoice shows Portuguese VAT (23 % standard rate) and the product-page price already includes it; the total you agree to at checkout never changes.
5. Shipping cost. Free within the EU, insured to the declared value.

A made-to-order ring cannot be returned because you changed your mind. That is not a Kove rule: EU consumer law (Directive 2011/83/EU, Article 16(c); §1837(d) of the Czech Civil Code) excludes goods made to the buyer’s specification from the 14-day withdrawal right — a Portuguese jeweller making a ring to order works under the same rule. What we do instead:

• You approve it before we make it. Every detail is confirmed with you, and you have a 48-hour window after ordering to change the specification free of charge.
• If the size is wrong, write to us before sending anything: most designs can be resized, and we quote the cost and shipping in advance.
• Lifetime warranty on craftsmanship — a loose stone, a lifted prong, missing pavé — on top of the statutory 24-month warranty for defects.
• Wrong item, defect or transit damage: a wrong item is exchanged or refunded in full; a defect is repaired, replaced or refunded; for transit damage, refuse the parcel or photograph the damage and contact us within 48 hours of delivery.

Full text: Return policy.

• Every diamond above 0.30 ct ships with its own IGI or GIA report; the number is laser-inscribed on the girdle. Check it online before the ring ships — GIA Report Check or IGI Verify Your Report — and match the inscription under a loupe after delivery.
• The finished ring comes with a printed Kove certificate showing the model, its net gold weight and a QR code that opens your stone’s lab report.
• The gold is hallmarked 585 (14K) or 750 (18K). Kove Jewelry is registered with the Czech Assay Office (Puncovní úřad), registration No. 15432 — ask us for the registration document if you want to check it.

Write to us first, so your ring’s specification is on record from the start: WhatsApp +420 797 867 801, answered in English by the Kove team, or e-mail info@kove.jewelry. We reply within one business day; Prague is one hour ahead of Lisbon. Send the model, your budget and, if you know it, her size — you get one recommended configuration with a certified stone.