Can anyone identify this stone?

Jewelry Discussion
21

We are miners-cutters-manufactureers of peruvian gemstones for 25
years from our facility in Lima Peru i. e. blue opal, pink opal,
azurite malachite, chrysocolla, ortiz rhdocrosite, blue aragonite
looking like larimar, turquoise bleu and windex blue ammazonite,
opaline), black jadeite and with pyrite, ortiz (translucent)
rhodocrosite, pink banded rhodocrosite, lime green serpentine,
angelite and much more. Having lectures and presented and as
consultant to GIA and others onecan tell blue opal by weight or
density and cleavage of the opal. In addition, one should use acetone
to tell if its dyed opal from India, China, Bangkok, Hong Kong, etc
or dyed brazilian agate, or another dyed stone and also if victoria
stone synthetic. Density tests and hardness tests, etc can
differentiate it from dichoric glass with slag used to imitate
imitate blue opal. Further blue opal or chrysopal as when we sold it
to Germany in the 1980s through 1990’swill have a blue-green flame
when crushed and burned meaning it is colored by copper / copper
minerals. You may contact us at [@Lee_Horowitz] or also
see our lecture/presenation on the netwith Washington DC GIA and
others under “Gemstones of Peru” Lee Horowitz Also see Rapaport
Daimond magazine June/July 2015 on peruvian blue opal with Sheryl
Jones or also with us in the 2002 Journal of Gemology June/July on
"Gemstones of Peru"

Lee Horowitz

1 Like
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I just wanted to add that I did some fancy Goggle searching and found reconstituted howlite mentioned a few times in connection with the image. I see a few of the replies have mentioned this material as well.

I used this Google image search to find the connections.

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My first thought was it reminded me of something that we have only a few pieces of and haven’t seen in years but it reminds me of old boulder opal or yahweh nuts, especially since the matrix is a brown not grey/black color.

24

@Sara_Lugo_Golden, according to

http://www.polyvore.com/stone_column_cuff_slider_starry/thing?id=157107843

Its multicolored howlite stones

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that is very interesting - they look good

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The description includes the word “resin”. My guess is that most of these “stones” are a mix of resin and color to resemble howlite’s grain structure. Commonly used for turquoise and a patented process.

Karen Christians
Artisans Asylum
10 Tyler St.
Somerville, MA 02143

781-367-4992