Book 1
How a Gem Gets Its Name
Colour is a clue. It is not the name.
US$25
₹2,377 on Razorpay
Sadhguru Gems And Jewellers
Gemology books
Ten short books written for this shop. Each one is US$25. Razorpay charges ₹2,377, the same rupee rate already used for the US$45 course. Anyone can read the first chapter. The file is yours after payment.
These notes are not a magazine, not another author’s book, and not a laboratory report. No other jewellery name is printed on them. Tradition is labelled as belief. Nothing here is a medical treatment.
Book 2
Light, Colour and Refractive Index
Why one stone looks brighter than another.
US$25
₹2,377 on Razorpay
Book 3
The Loupe Desk
What ten times magnification can, and cannot, say.
US$25
₹2,377 on Razorpay
Book 4
Weight, Hardness and the Safe Tests
Heavy for its size is a clue. A scratch is not a shop trick.
US$25
₹2,377 on Razorpay
Book 5
Ruby and Sapphire, Told Plainly
Both are corundum. The colour is not a second mineral.
US$25
₹2,377 on Razorpay
Book 6
Emerald, and the Green Mistake
Green is a colour. Emerald is green beryl.
US$25
₹2,377 on Razorpay
Book 7
Diamond, and What Only Looks Like One
Sparkle is cheap to imitate. The material is not.
US$25
₹2,377 on Razorpay
Book 8
The Quartz Family
Amethyst, citrine, jasper, agate and aventurine, without the wrong names.
US$25
₹2,377 on Razorpay
Book 9
Treatments, Laboratory-Grown Stones and Imitations
Three different sentences. Do not fold them into one.
US$25
₹2,377 on Razorpay
Book 10
What a Careful Bill Should Say
The last page of gemology is the sentence on the paper.
US$25
₹2,377 on Razorpay