Signet S
No. 402 · The Claim
Solid 14K gold · from 11.9 g


The production 3D file, at real size, shown in 14K yellow gold. Drag to turn it.
Colours in 3D are computed live on your screen. The images beside it are renders of the same production file.




No. 535 · The Assay Office
A polished square, framed in nugget relief. An inverse nugget ring in solid 14K gold or sterling silver.
The Assay Office
From the 1850s, San Francisco jewelers set polished gold-veined quartz in gold.
In San Francisco, from the 1850s, jewelers cut and polished slabs of white quartz veined with native gold and set them in gold: brooches, watch chains, jewel boxes. The polished stone was in the middle and the metal around it. Inverse does the opposite of our signets: a raised, flat square of polished gold in the center of the face, inside a border of nugget relief, rough gold framing the smooth.
| US size | 14K yellow gold | Sterling silver |
|---|---|---|
| US 6 | from 11.6 g | from 9.2 g |
| US 8 | from 12.1 g | from 9.6 g |
| US 10 | from 12.7 g | from 10.0 g |
| US 12 | from 13.2 g | from 10.4 g |
| US 14 | from 13.7 g | from 10.8 g |
Your order details identify the selected metal. Weights are estimated from the 3D file we cast from. How the estimate works

The Assay Office nugget collection: rings in solid 14K gold or sterling silver shaped like the bars, ingots, octagons and stepped frames of the assay trade, the nugget relief set inside them; most are nugget signet rings. At the assay office, loose gold was melted, tested for fineness and cast into stamped bars.
More from The Assay OfficeOur workshop makes engagement rings. It casts each nugget ring in your size after you order, from the 3D file I draw, and the certificate gives the metal and the estimated weight.
Our storySolid 14K gold keeps the warm yellow of our pictures. Sterling silver is the same ring again. Each has one fixed price per design.
Compare the metalsHalf a size above your usual size: Inverse has a wide fit and sits snugly. We cast the exact US size you pick, 4 to 15, half sizes included.
In solid 14K gold, from 11.6 g at US 6, from 12.7 g at US 10, from 13.7 g at US 14; in sterling silver, from 10.0 g at US 10. The weights are estimated from the 3D file we cast from, and the weight table on this page gives more sizes.
Both are in The Assay Office. Inverse: a top 13.5 mm wide along the finger, 2.8 mm high, from 12.7 g in 14K at US 10, marked Occasion. Triptych: a top 10.4 mm wide along the finger, 3.5 mm high, from 14.3 g in 14K at US 10, marked Occasion.
Made to order
Cast in your size after you order, by our workshop.
Making and shippingFree US shipping
Free shipping in the US.
Shipping30-day returns
Catalog rings without engraving, within 30 days of delivery.
ReturnsQuestions?
Ask before you order: sizing, metal, timing.
FAQ and contact