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HOW TO DIFFERENTIATE DIAMOND FROM GLASS OR QUARTZ

GEOLOGY MADE SIMPLE – DAY 2

 

DIAMOND AND QUARTZ

I hope you enjoyed the previous lesson! Diamond, Moissanite, Cubic Zirconia and Quartz are minerals that look the same under unprofessional lenses. Careful scrutiny is required to differentiate them. Here are basic tests to betray their silent ‘egos’.

DIFFERENCES

#1 Diamond is the hardest natural mineral so ‘nothing’ can scratch it. Get an Aluminium Oxide(Corundum) sandpaper and rub the mineral on it. If any scratch is left on the surface of the mineral, then beloved, the mineral is Quartz or Cubic Zirconia not Diamond.

#2 Get some quantity of HF(Hydrofluoric Acid) and drop the mineral in it. If the acid reacts with the mineral at room temperature(RT), then the mineral is Quartz or Cubic Zirconia. Diamond does not react with any liquid acid at RT. Please, HF is extremely strong acid and can eat through your bones so extreme caution must be observed during this test.

#3 Blow air onto the mineral. If the mineral fogs like mirror fogs when air is blown onto it, then the mineral is not diamond!

#4 Hold the mineral and expose it to sunlight. If rainbow colours are seen in the mineral, the mineral is Quartz or Cubic Zirconia. Diamond shows grey/white internal brilliance not rainbow brilliance. Diamond throws rainbow colours onto objects when exposed to sunlight-diamond fires.
Get a piece of white paper. Use gentian voilet to make a dot on the paper. Put the mineral on the centre of the dot. If you can see the dot through the mineral, then the mineral is not diamond. Diamond has high refractive index which strongly bends light when it passes through it; this makes dots, letters, etc invisible when viewed through diamond.

#5 Contact a professional Geological Engineer like myself or any Gemologist.

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