Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The δ13C relative distributions of natural diamonds: (A) worldwide, (B) peridotitic with silicate inclusion, and (C) eclogitic with silicate inclusion. The arrows indicate the highest and lowest δ13C values of each group. A mean δ13C value of the worldwide diamond is −7.2‰. The data are from ref. 18.
