Carat Hunter · Diamond retailer comparisons

NZ Jewellers vs William & Sons Jewelers

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

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

At a glance

	NZ Jewellers	William & Sons Jewelers
Founded	2006	Not provided
Headquarters	Auckland, New Zealand	San Diego, CA, US
Current listings	2,493,439	1,347,647
Origin mix	Lab + Natural	Lab + Natural
Cert labs accepted	AGS · CGL · DBGIS · DF · EGL · EGL HK · EGL ISRAEL · EGL USA · EGLUSA · GCAL · GIA · GIA-PREMIUM · GSI · HRD · IGI · OTHER · R&F · SGL · SGS · UNKNOWN · WISE	AGS · EGL · GCAL · GIA · GSI · HRD · IGI · SGS · UNKNOWN · WISE
Ships to	New Zealand · International	US · CA
Return window	30 days	Final sale: no returns
Terms checked	October 19, 2026	October 19, 2026

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.

NZ Jewellers

Origin mix

Lab-grown 58%Natural 42%

Most common shapes

Round 47%·Oval 14%·Pear 10%·Emerald 8%

William & Sons Jewelers

Origin mix

Lab-grown 70%Natural 30%

Most common shapes

Round 35%·Oval 13%·Pear 10%·Emerald 9%

Stones stocked by both

We track 590,361 diamonds currently listed at both stores.

Most common overlap: Round, 1ct, lab-grown, D VVS2

Explore Round 1ct D VVS2 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? Only NZ Jewellers ships there.
Need GIA grading? Both stores carry it.
Need IGI grading? Both stores carry it.
Need HRD grading? Both stores carry it.
NZ Jewellers stocks more lab-grown. William & Sons Jewelers 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.