Journal

• Neelam, explained

  Why blue sapphire is famous for working fast, and the three-day trial most jyotishis recommend before you commit.

• Pukhraj vs. yellow topaz

  How to tell them apart, why topaz is an accepted substitute, and when it isn’t.

• Reading an emerald report

  Inclusions, oiling grades and origin: what the lab card actually tells you.