[Rockhounds] Concerning malachite and pseudomalachite from Brown's Prospect, Rum Jungle, Australia

[Kreigh Tomaszewski]

You can sort it out non-destructively with x-rays, or use the acid field
test.
https://crystallography365.wordpress.com/2014/11/12/a-mineral-imposter-pseudomalachite/

On Thu, Jun 14, 2018 at 8:57 PM, Timothy Blackwood <
Tim_Blackwood1 at hotmail.com> wrote:

> Hi,
>
>
> I will be receiving a specimen of pyromorphite on
> malachite/pseudomalachite with chrysocolla from Brown's prospect, Rum
> Jungle, Australia, in the not too distant future. The green mineral, in
> lighter and darker shades, was identified as malachite...but may also be
> pseudomalachite. The specimen is from the late 1970s finds at the locality.
>
>
> The green mineral occurs as lighter colored balls of finer crystals, while
> the darker balls consist of larger, more distinct crystals. I know that
> malachite and pseudomalachite can be separated using HCl. Are there any
> visual cues, like the presence or absence of larger crystals? And will
> vinegar be strong enough to elicit a response from the malachite? I really
> don't want to do anything that might cause damage to the piece. Thanks in
> advance. 😊
>
>
> Best wishes,
>
> Tim
>
>
> Timothy J. Blackwood
> E-mail: Tim_Blackwood1 at hotmail.com<mailto:Tim_Blackwood1 at hotmail.com>
> Phone: (218) 999-0603
> Home Address:
> 120 NW 5th Street Apartment 101
> Cohasset, Minnesota, USA 55721
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