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Can anyone help? What would be the liquid for specific gravity
3.32 Thanks Bob Indep, Ks

    Can anyone help? What would be the liquid for specific
gravity 3.32 Thanks Bob Indep, Ks

G’day Bob: Pure methylene iodide has a specific gravity
(density) of 3.32

  • Practical Gemmology, Robert Webster, NAG Press, London: probably
    now out of print as I bought it about 25 years ago! Cheers,

         /\
        / /    John Burgess, Nelson, New Zealand
       / /
      / //\    @John_Burgess2
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    (_________)

Can anyone help? What would be the liquid for specific gravity
3.32 Thanks Bob Indep, Ks

Bob,

Methylene Iodide or to state its more updated name Di-Iodomethane
is most probably what you are thinking of.

best wishes

Nick
State of Bahrain

Can anyone help? What would be the liquid for specific gravity
3.32 Thanks Bob Indep, Ks

Methylene Iodide
Carol


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’’

Hello Robert,

Methylene Iodide.
SG : 3.33

Methylene Iodide is the most useful specific gravity liquid to the
gemmologist. It possess a higher density than most of other pure
liquids, but also do have a high refractive index, RI : 1.74 which
gives its great value.

Methylene iodide diluted with Monobromonaphtalene to an SG of 3.05
will distinguished between :

  • Tourmaline, SG : 3.05, the tourmaline will suspend.
  • Nephrite Jade, SG : 3.00, nephrite will float.
  • Jadeite, SG : 3.34, jadeite will sink (very slowly).

Methylene iodide is very usefull for ‘immersion method’.

Best Regards,

Francoise.

Hi Bob,

 What would be the liquid for specific gravity 3.32<<

3.32 SG liquid is pure methylene iodide. The others in a typical
SG set, 2.57, 2.62, 2.67 & 3.05, are mixtures of methylene iodide &
benzyl benzoate. There’s an aroma to most of them that alot of
folks find offensive. The lower SG’s, 2.57-2.67, have a tendency to
darken with age. A few small pieces of copper in each container
helps prevent the darkening.

Dave

Greetings Robert

I have been sitting in the background watching after having to
replace a HD going down with everything on it.

Your question on SG the one you are looking for is Methylene
Iodide with a SG of 3.32.

Best wishes

Major Boyce @pyramid

The greatest pleasure in life is doing what people say you cannot do.

EVERYBODY has a talent. What is rare is the courage to follow that talent to
the dark place where it leads.