Andrew Mason

Making gems. Part three: Tweaking the recipe

Making rubies

The fish black is ready! This is the base product needed for producing a whole series of gems: rubies, sapphires, emeralds, garnet, topaz, and blue sapphires.

Time to start making those rubies!

Here’s the recipe:

एतत्कर्षद्वयं तस्याः काचकूप्यां विनिक्षिपेत् ॥५॥

वर्षोपलास्तु तेनैव लालयित्वा सुपाचिते ।