37 Observatory

Aligning observatory systems

37 Studios

Precious Metals

Every metal used in our pieces is independently assayed, weighed, and documented. Each gram is traced from source to integration, with purity verified by certified assay offices.

24K Gold

999.9 (99.99%)

Pure gold, the standard for investment-grade precious metals. Soft and malleable, used in our thread integration process.

Gold Content99.99%
Density19.32 g/cm³
Melting Point1,064°C
Mohs Hardness2.5-3

22K Gold

916.7 (91.67%)

High-purity gold alloyed with small amounts of copper or silver. Offers better durability while maintaining rich color.

Gold Content91.67%
Alloy8.33% copper/silver
Density17.6 g/cm³
Mohs Hardness3-3.5

18K Gold

750 (75.0%)

The jewelry standard. Three-quarters pure gold, offering excellent balance between purity, durability, and workability.

Gold Content75.0%
Alloy25% copper/silver/zinc
Density15.5 g/cm³
Mohs Hardness3.5-4
Our Standard

14K Gold

585 (58.5%)

Our signature standard. The perfect balance of durability, beauty, and value—chosen by collectors worldwide for everyday wear that lasts generations.

Gold Content58.5%
Alloy41.5% copper/silver/zinc
Density13.5 g/cm³
Mohs Hardness4-4.5

10K Gold

417 (41.7%)

Minimum karat to be legally called 'gold' in the US. Maximum durability with minimal gold content.

Gold Content41.7%
Alloy58.3% copper/silver/zinc
Density11.8 g/cm³
Mohs Hardness4.5-5

Platinum

950 Platinum

The rarest and most durable precious metal. Naturally white, hypoallergenic, and resistant to tarnish.

Density21.45 g/cm³
Melting Point1,768°C
Mohs Hardness4-4.5
ColorNatural white

Material Documentation

Each piece includes a complete material record with assay certificates, weight verification, and chain of custody documentation.

Assay Office

Certified Independent

Weight Tolerance

±0.05g per component

Registry Link

37 Registry Serial

37 Studios

A study between fashion, collectibles, and precious metals.

Each object is produced as a numbered edition, verified for its material composition, and permanently documented by the 37 Registry blockchain.

© 2026 37 Studios. All rights reserved.