Monolith
No. 504 · The Assay Office
Solid 14K gold · from 18.3 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. 523 · The Assay Office
A nugget dome, cut flat on top. A facet nugget ring in solid 14K gold or sterling silver.
The Assay Office
A facet is a flat polished face cut on a stone. Here a flat polished oval sits on top of a domed head, with nugget relief all around its sides.
Not every mass of gold is a rounded nugget. In August 1864, on the Middle Fork of the American River in California, William Russell Davis found a mass of crystallized gold of about 201 troy ounces. Jules Fricot bought it in 1865: the Fricot Nugget. It was shown in Paris in 1878, disappeared, turned up again in a bank vault in 1943, and is now at the California State Mining and Mineral Museum in Mariposa. Facet keeps that contrast: a flat polished oval on top of a domed head, with raw nugget relief all around its sides.
| US size | 14K yellow gold | Sterling silver |
|---|---|---|
| US 6 | from 17.4 g | from 13.8 g |
| US 8 | from 18.2 g | from 14.4 g |
| US 10 | from 19.0 g | from 15.0 g |
| US 12 | from 19.8 g | from 15.7 g |
| US 14 | from 20.6 g | from 16.3 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: Facet 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 17.4 g at US 6, from 19.0 g at US 10, from 20.6 g at US 14; in sterling silver, from 15.0 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. Facet: a top 15.3 mm wide along the finger, 4.9 mm high, from 19.0 g in 14K at US 10, marked Occasion. Monolith: a top 20.0 mm wide along the finger, 3.4 mm high, from 18.3 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