Beyond Carat vs Brian Gavin

The concession, stated first and in full

Brian Gavin has the deepest technical story of any lab-grown seller we have looked at. In their own words, they use the GIA to grade colour, clarity and light performance, and say the quality is assured not only by Brian Gavin but by the GIA’s AGS Ideal Report. They publish an ASET image for every stone in the collection alongside hearts-and-arrows optical symmetry, and the cut itself is covered by US Patent 10405618. Their CVD crystals are grown in Austin, Texas on a single-growth-cycle process, and there is a programme that will grow a diamond to your size and cut specification.

Beyond Carat has no answer to any of it. We are IGI-only. We publish no light-performance imagery. We do not hold a cut patent, we do not grow crystals, and we set stones rather than cutting them. If those things are what you came for, this comparison ends here in their favour and we would rather you knew that in the first thirty seconds than the last.

Bottom line: on diamond science, they win, comfortably, and it is not a close question.

The window, and the list

Their published inspection period runs fifteen days, with day one being the day the package reaches you and the return needing to be postmarked by the sixteenth day at the latest. Two weeks is a real constraint on a purchase that is often hidden until a specific evening.

The exclusion list matters more. Their policy makes final sale of every hand-engraved item, every bezel-set ring, pendant, earring and bracelet, every third-party designer setting from the houses they carry, anything described as hand made, and all custom items. Bezel is not a niche choice — it is one of the most requested settings for anyone who works with their hands — and choosing it removes the return right entirely, along with eligibility for upgrade or buyback. And $250 is charged unless the original certificate returns whole and in its original condition.

None of that is hidden; it is published on their policies page, which is the reason we can cite it. But it is the kind of thing people read after they order rather than before. Our window is 30 days from the day the piece ships, with a prepaid insured UPS label for U.S. customers, and our standard catalogue pieces carry no final-sale list. Conditions are on our returns page.

Bottom line: check the setting style against the exclusion list before ordering. If it is bezel, you are buying without a return.

Two lifetime warranties that are not the same shape

Both companies use the phrase. Theirs, last revised in mid-2025, covers structural flaws in metal or setting, craftsmanship issues, defective soldering or finishing, and prongs that fail through manufacturing error — a genuinely broad list. The conditions are where the two diverge: the piece must be checked by them or a competent jeweller once every one to two years for cover to stay alive, any repair a jeweller recommends must be carried out by them or the warranty is void, and cover belongs to the original purchaser and cannot be passed on.

That is a maintenance relationship as much as a warranty, and for somebody near Houston it is probably an advantage — they will also handle prong checks, deep cleaning and polishing on request. For somebody who moves, travels, or simply forgets, an every-other-year obligation is a way for cover to end without anyone deciding to end it.

On our side the cover is narrower and unconditional: manufacturing faults in the metalwork and the setting, for as long as the ring is yours, with no interval to remember and no record to file. Accidental damage sits outside it, as it does outside theirs.

Bottom line: broader cover with an attendance requirement, versus narrower cover with none. Pick the one that matches how you actually live.

Shipping, resizing and the small charges

Their carriage is tiered: complimentary FedEx Standard Overnight from $5,000, complimentary FedEx 2nd Day between $1,000 and $4,999, and charged below $999. The default delivery is collection from a FedEx station with photo identification; having it brought to a home or workplace with a signature costs extra. Their free resize gives you one full size within the first year, and you pay round-trip carriage and insurance for it.

We ship free everywhere we deliver, with no order value threshold. Inside the United States that means UPS 2nd Day Air, fully insured, signature required, delivered to your address rather than a depot. Our free resize covers one size change within 30 days of despatch on U.S. orders.

Bottom line: their shipping gets better as the order gets bigger; ours is the same at every order value, in both directions.

Upgrades, and reading the fine print on them

Their upgrade programme is worth understanding before it factors into a decision. A BG Premium Lab stone can be traded toward another BG Premium Lab stone or toward one of their Signature natural diamonds, but it is valued at current lab market pricing at the time of the trade — and lab-grown market prices have been falling, so that valuation is not a store of value. Upgrades do not apply to their Deluxe or Select lab tiers at all. The one-year buyback at 70% of current market price applies to Signature natural diamonds only, not to lab-grown, and not to jewelry containing diamonds.

Beyond Carat does not currently publish trade-in or upgrade terms, so there is nothing here to set against theirs — ask us directly rather than assuming either way. A buyer who needs a published programme should count the gap against us.

Bottom line: an upgrade path exists there and not here, but read which tier and which stone type it actually applies to.

Reviews, without spin

Their Trustpilot profile scores 4.8 across roughly 1,900 reviews — the score is verified, the count is approximate and paginated. Ours is 4.8 across 43, as of August 2026. Same score, forty times the evidence behind theirs, and anybody weighing public track record should weigh it that way.

What we can say about our own base is narrow and dated on purpose: as of August 2026, every one of our 43 Trustpilot reviews is 4 or 5 stars, and Trustpilot’s own label on our profile reads “Asks customers to review — invites their customers to review, whether positive or negative”. That label is Trustpilot’s, not ours, and it is the only meaningful answer to the reasonable suspicion that a small, high-scoring base invites.

Bottom line: identical scores, incomparable sample sizes. Do not let a matching number do work it cannot do.