Carat Hunter · Diamond retailer comparisons

Flawless Fine Jewelry vs Moon Ocean

Side-by-side store comparison. Independent and non-promotional.

Data current as of October 29, 2026 · Updated daily. Zero affiliate revenue.

At a glance

	Flawless Fine Jewelry	Moon Ocean
Founded	2014	2022
Headquarters	London, United Kingdom	London, United Kingdom
Current listings	378,294	1,297,780
Origin mix	Lab + Natural	Lab + Natural
Cert labs accepted	GIA · HRD · IGI · OTHER	AGS · DF · EGL · GCAL · GIA · HRD · IGI · OTHER · R&F · SGS · UNKNOWN · WISE
Ships to	US · UK · Worldwide	UK · International
Return window	30 days	30 days
Terms checked	June 15, 2026	Not yet verified

Current listings, origin mix and accepted labs are updated daily. Founded, headquarters and shipping come from public sources. Return terms are our summary of each retailer's own policy page, dated per retailer in the table. Retailers change their terms, so check the retailer's own returns and shipping pages before you buy.

What each store stocks

Inventory composition observed across each store's current listings.

Flawless Fine Jewelry

Origin mix

Lab-grown 54%Natural 46%

Most common shapes

Round 26%·Oval 17%·Emerald 13%·Pear 13%

Moon Ocean

Origin mix

Lab-grown 63%Natural 37%

Most common shapes

Round 47%·Oval 14%·Pear 9%·Cushion 7%

Stones stocked by both

We track 142,995 diamonds currently listed at both stores.

Most common overlap: Round, 0.5ct, natural, F VS1

Explore Round 0.5ct F VS1 cohort

Each matched stone has its own page where both retailers' prices appear next to the same physical diamond. That is where price comparison happens, on the stone, not on this page.

Pick by what you are looking for

Need shipping to United Kingdom? Both stores ship there.
Need GIA grading? Both stores carry it.
Need IGI grading? Both stores carry it.
Need HRD grading? Both stores carry it.
Flawless Fine Jewelry stocks more natural. Moon Ocean stocks more lab-grown.

Looking for a specific spec?

Browse every retailer in our index, grouped by shape, carat, colour, and clarity. Thousands of spec pages.

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Questions we get

Does Carat Hunter earn commission from either store?

No. We earn zero affiliate revenue from any retailer in our index.

Why do you not show price comparisons on this page?

Pricing varies per stone, not per store. Click through to any matched diamond above and you'll see both retailers' prices on the exact same physical stone, which is the real comparison.

How fresh is this data?

Listings refresh as we re-read each retailer, most of them every day. Static facts refresh monthly.

How do I find a specific stone at both stores?

Use the GIA or IGI certificate number in our search.