Deep Time and the Mohs Scale

How old could the crystal in your hand be?  Lets use analogy to help us grasp the figures.

Imagine that a human life of 70 years is equal to 1 minute.

A piece of Rock Crystal would then be a year old. [That is 70 x 60(minutes)  x 24(hours) x 365(days)].

The dinosours would have disappeared 2 years ago.  Diamonds would be 30 years old.

Zircon would be 90 years old.   Earth would be 150 years old.


Crystals are gauged for their relative hardnesses,(H), according to the Moh’s scale .  The scale goes from 1 to 10, where 10 is the hardest. Each mineral, from N0. 2 upwards can scratch those below it, but not those above. As our fingernails are usually around H2.5,  they can be scratched by calcite, but not by talc. For reference, a pen-knife is H6.5.

1    Talc

2    Gypsum

3    Calcite

4     Fluorite

5     Apatite

6     Felspar

7     Quartz

8     Topaz

9     Corundum

10    Diamond

Copyright © Crystal Gateways 2005 – 2012. Amanda and Francis Moloney.


Needless it should be to say, but said it must be: Nothing written on this website should be considered before professional medical advice in the case of any medical condition whatsoever. And, only an idiot, or a complete curmudgeon would believe otherwise!


Please feel free to use excerpts and links from this original copyright material on the provision that you have natural good manners and say where you got it:
Francis Moloney@

© Crystal Gateways 2012


Author: amras888

Francis Moloney @Amras888 Composer, instrumentalist and Logic 8 software user. Bereavement Counselor retired. A Philosopher now disabled, bedbound but happy. Love my wife, son, and dog.

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