New funny inclusions in high temperature heated pink sapphire from Sri Lanca (guessed origin). Never before saw anything like that. I call it "BAGEL"...
Dark filed illumination, polarized light, 100x, FoV 2.08 mm cropped
Dark filed illumination, polarized light, 200x, FoV 1.15 mm
The only my suggestion is - initially it was some kind of multi-component inclusion. Different components has reacted to high temperature differently. Middle part melted into glass, but side part had higher melting point and turned to be a crust for fully transparent glass.
No other ideas..
_________________ All stones are alike, all stones are precious; but man sees only a few of them... Maurice Maeterlinck
Just fanny looking land(stone)scape.. Actually it is cavity in the faceted sapphire from Cambodia, with some very tiny crystals on the inner surface. Has 2 spots reaching surface.
Dark field and fiber-optic, 60x, FoV 2.35 mm
_________________ All stones are alike, all stones are precious; but man sees only a few of them... Maurice Maeterlinck
Inclusions in Canadian andradite - demantoid (Asbestos, Jeffry Mine). Chromite crystal (as referenced by local specialists) and byssolite fibers (horsetail). Together with some other samples has been purchased at Montreal Mineral show just day before...
Pictures are a bit blurry because through natural unpolished facets...
1. Dark field, 60x, FoV 3.85 mm 2. Dark field, 100x, FoV 2.30 mm
_________________ All stones are alike, all stones are precious; but man sees only a few of them... Maurice Maeterlinck
Inclusions in crystals of Brazilian light orange topazes. Both pictures also tinted and blurry due natural crystal shading, especially second.
1. Transmitted light, dark field illumination, 60x, FoV 4.05 mm. I guess it is hematite or something else from ferrous-oxides. 2. Transmitted polarized light, 100x, FoV 2.35 mm. Unknown dark brown crystal, to many possible guesses. But I did not browse jet Inclusions Atlas and catalogs.
_________________ All stones are alike, all stones are precious; but man sees only a few of them... Maurice Maeterlinck
Very small tiny flower, I see here tulip, has grown in topaz... This guy chose this place where always will be just such a tiny, but he will remain forever! Nobody never will cut him of the his root, and he never will die in a vase!
Inclusion in Brazilian light reddish-orange topaz, transmitted polarized light, 100x, FoV 2.35 mm
_________________ All stones are alike, all stones are precious; but man sees only a few of them... Maurice Maeterlinck
Post subject: Re: Usual and unusual gemstones and inclusions
Posted: Fri Apr 22, 2016 4:37 pm
Gemology Online Veteran
Joined: Mon Jun 16, 2014 1:10 pm Posts: 850
GSK wrote:
Inclusions in Canadian andradite - demantoid (Asbestos, Jeffry Mine). Chromite crystal (as referenced by local specialists) and byssolite fibers (horsetail). Together with some other samples has been purchased at Montreal Mineral show just day before...
Pictures are a bit blurry because through natural unpolished facets...
1. Dark field, 60x, FoV 3.85 mm 2. Dark field, 100x, FoV 2.30 mm
No, no no... Nothing Russian in this demantoid except photographer...
I am getting soon a bag with 200-300 small crystals approx similar size or a bit larger, and can share then some where will find something like this, not a problem..
_________________ All stones are alike, all stones are precious; but man sees only a few of them... Maurice Maeterlinck
Funny bubble in herkimer quartz. Yes, it looks like a cavity filled by gas with little pieces of bitumen stock in, on and around, but how such an object could appear, what processes made it exist, I am thinking and can not find logical answer... Curious.
Polarized transmitted light, 100x, FoV2.35 mm
_________________ All stones are alike, all stones are precious; but man sees only a few of them... Maurice Maeterlinck
Post subject: Re: Usual and unusual gemstones and inclusions
Posted: Sat Apr 23, 2016 2:29 am
Gemology Online Veteran
Joined: Mon Jun 16, 2014 1:10 pm Posts: 850
GSK wrote:
No, no no... Nothing Russian in this demantoid except photographer...
I am getting soon a bag with 200-300 small crystals approx similar size or a bit larger, and can share then some where will find something like this, not a problem..
That would be great!!! We have several pakistani Demantoid - some with chromian magnetite inclusion in the center. So we could give you some too.
I have a 2,8 ct clean crystal - don't know whether cut it or leave it?? Super shape....
If you find some horsetail inclusion like in the stone you posted here please contact Gübelin Lab - they work about them and I think this would be interesting to compare these canadian stones with other sources esp. russian.
The will get some of my demantoids - Pakistan, Mexico and Iran.
Another a few samples of inclusions in Canadian demantoids. Shown a few days before inclusions belong to middle crystal from bottom line on this picture:
Looking at another crystal I was thinking that sometime Mother-Nature is not very fair and caring... Offering such a perfect service like creation of beautiful crystals, which can be turned into beautiful gemstones, Mother-Nature keep forgetting to polish natural facets of her crystals... And it is SO DIFFICULT some time to photograph inclusions through natural facets forgotten to be polished...
Inclusion in another crystal of andradite-demantoid from Jeffry Mine, Quebec, Canada. This time it is crystal from bottom line, right end. Both shots are taken under transmitted light, dark filed illumination and shadowing, 80x, FoV 2.70 mm and 3.00 mm
But then.. Looking at next one (left larger) I wanted to say THANK YOU MOTHER-NATURE for forgetting to polish natural facets of this crystal!!!
On the beginning looking at these things I thought it just dust particles. I tried to remove this dust. But what I saw these things were moving like branches of bushes while my soft brush touching them, but has not been removed!
Under higher magnification and changing the position of crystal towards lenses I understood - there are fibers ingrown into crystal! Or other way to say - fibers sticking out of crystal facet!
I do not have much experience with demantoids crystals, I have them on hands just 3-d time in my life. So I have no idea if it is normal habit for demantoids or not.. Looks like fibers started to grow in crystal and for a while were growing together with crystal, but then crustal stopped grow-process, but fibers continued! When crystal has been taken of matrix, ends of fibers left outside of host-rock!
Transmitted light, dark field illumination, 120x, FoV 2.00 mm and transmitted light, dark field illumination, 200x, FoV 1.15 mm
_________________ All stones are alike, all stones are precious; but man sees only a few of them... Maurice Maeterlinck
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