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A general guide for using the Forum with some rules and tips
Best Finds of the Month!
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Conor Quinlan




Joined: 14 Feb 2020
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PostPosted: Jun 10, 2020 14:53    Post subject: Re: Best Finds of the Month! (June)  

Hello Everyone,

I have many incredible specimens to share this month after expanding my personal collection during this lull.

The following mineral specimens will be posted in random order below over the course of the week. Each post will include (2) specimens with pictures & a short description:

1. Carlsbad-twinned topaz a/f orthoclase
2. Red topaz & hyalite opal
3. Beryl var. aquamarine & tourmaline var. schorl on orthoclase
4. Native copper a/f cuprite with native silver
5. Kunzite covered with bi-colored tourmaline
6. Rhodochrosite a/f bivalve fossil
7. Chunky hexagonal mimetite on matrix
8. Iridescent opal in silica matrix
9. Native crystalline gold

Mineral Posts:

3. High quality aquamarine specimens are a favorite amongst collectors because of their jaw dropping aesthetic nature. The enticing rich blue color in combination with a gorgeous crystalline structure makes this species a must have for any serious collector.
I have wanted a top quality aquamarine ever since I was a kid & this specimen doesn't disappoint with a few unique features!
Features a huge (7.3 cm) long doubly terminated partially clear aquamarine that's uniquely interpenetrated with dark scholar crystal at the center.
Dozens of complex & beautiful scholar crystals cover the specimen as well as several more aquamarine crystals.
Exhibited on a matrix of solid orthoclase which displays an aesthetic pattern of complex twinning & structural modifications.

9. Just acquired a few days ago, normally I'm not as interested in gold specimens, but this native gold exhibits some of the most interesting crystal formations I have ever seen!
Primarily a very rare (1.5 cm) formation made from (6-7) perfectly terminated spinel-law twin crystals!
Several hoppered octahedrons ranging from (1 - 3 mm) in size surround the formation.
Beautiful compact dendritic patterns are exhibited on the opposite side the specimen.
Complete "Floater" crystal with no damage or points of contact!
Exquisite top quality "mirror-brilliant" luster with a buttery yellow golden hue



aqua scholar ortho 4.jpg
 Mineral: Beryl (variety aquamarine) & Schorl (Tourmaline Group) on Orthoclase
 Locality:
Erongo Region, Namibia
 Dimensions: (11.3 x 6.9 x 6 cm)
 Description:
 Viewed:  1546 Time(s)

aqua scholar ortho 4.jpg



aqua scholar ortho.jpg
 Mineral: Beryl (variety aquamarine) & Schorl (Tourmaline Group) on Orthoclase
 Locality:
Erongo Region, Namibia
 Dimensions: (11.3 x 6.9 x 6 cm)
 Description:
Image shows the back of the specimen where the complex twinned orthoclase is displayed. Very Aesthetic!
 Viewed:  1546 Time(s)

aqua scholar ortho.jpg



gold 7.jpg
 Mineral: Gold
 Locality:
Eagle's Nest Mine, Sage Hill, Michigan Bluff District, Placer County, California, USA
 Dimensions: (2.1 x 1.6 x 1.2 cm)
 Description:
Native Crystalline Gold
Shows the complex & beautiful crystalline formation made up of what I believe are either spinel law, triangular contact twins or some combination.
 Viewed:  1546 Time(s)

gold 7.jpg



gold 9.jpg
 Mineral: Gold
 Locality:
Eagle's Nest Mine, Sage Hill, Michigan Bluff District, Placer County, California, USA
 Dimensions: (2.1 x 1.6 x 1.2 cm)
 Description:
Native Crystalline Gold
Shows the other side of the specimen which exhibits a mesmerizing compact dendritic pattern formation
 Viewed:  1546 Time(s)

gold 9.jpg



gold 5.jpg
 Mineral: Gold
 Locality:
Eagle's Nest Mine, Sage Hill, Michigan Bluff District, Placer County, California, USA
 Dimensions: (2.1 x 1.6 x 1.2 cm)
 Description:
Native Crystalline Gold
Angle shows the suspected "triangular contact twins" as well as some "hopped octahedron" crystals
 Viewed:  1545 Time(s)

gold 5.jpg



aqua scholar ortho 5.jpg
 Mineral: Beryl (variety aquamarine) & Schorl (Tourmaline Group) on Orthoclase
 Locality:
Erongo Region, Namibia
 Dimensions: (11.3 x 6.9 x 6 cm)
 Description:
 Viewed:  1542 Time(s)

aqua scholar ortho 5.jpg



_________________
Sincerely,
Conor Quinlan | (Tucson, AZ)
(+20-Yrs) of Mineral Hunting Experience
Tucson Mineral Show Fanatic Since (1999)
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Conor Quinlan




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PostPosted: Jun 10, 2020 15:26    Post subject: Re: Best Finds of the Month!  

Sorry for the late response, it's been a busy couple weeks.

I agree that labeling is necessary to give a specimen legitimate historical value. I should've introduced the specimen differently; yes, I wish the specimen included a label but the actual mineral itself is more important to my personal collection than the history as I collect feldspar minerals & even without a label it's still a rare ortho pseudo that was most likely sourced from Cornwall between 1828-1860s.
And w/o the label I was able to negotiate a far better deal!

I have read several articles and there seem to be relatively few locations that produce these Carlsbad pseudos, especially more recently (after 1900). I can only find one mine outside the U.K. that produces similar pseudos in Bolivia, but their appearance seems fairly distinct from the Cornwall pieces which have minute tinges of dark red-orange spots. The Cornwall Mine stopped producing these specimens in 1860s. Given this info, I am confident the specimen is from Cornwall, just don't know the exact mining date, but it's most likely before 1860!

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Conor Quinlan | (Tucson, AZ)
(+20-Yrs) of Mineral Hunting Experience
Tucson Mineral Show Fanatic Since (1999)
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Tobi




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PostPosted: Jun 15, 2020 04:08    Post subject: Re: Best Finds of the Month!  

I really like that 11 cm aquamarine specimen from Erongo.
A world-class piece, congratulations!
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Conor Quinlan




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PostPosted: Jun 17, 2020 18:20    Post subject: Re: Best Finds of the Month! (Mimetite & Copper a/f Cuprite w/ Silver)  

(2 of 4) Update on "Best of the Month mineral specimens":

4. Native Copper a/f Cuprite w/ Native Silver:
I have never been a huge fan of metal based minerals but I was pleasantly surprised by this stunning piece which exhibits copper in a way that was truly aesthetic to me. The sharply defined copper pseudomorph displays intricately defined crystals that maintain a perfect octahedral structure. The bit of native silver that shines though is displayed in the form of a disk along with several other smaller patches of silver which are spread all over the specimen.

7. Chunky Hexagonal Mimetite on Matrix:
Perfect & Beautiful this mimetite specimen shows how stunning the mineral can be when exhibited in the form of larger crystals (up to 1.2 cm). The appearance is somewhat special too with a butterscotch yellow color.



copper af cuprite 3.jpg
 Mineral: Copper a/f Cuprite w/ Native Silver
 Locality:
Rubtsovskoe Mine, Rubtsovsky District, Altai Krai, Russia
 Dimensions: (2.7 x 2.4 x 2.5 cm)
 Description:
 Viewed:  1145 Time(s)

copper af cuprite 3.jpg



copper af cuprite 2.jpg
 Mineral: Copper a/f Cuprite w/ Native Silver
 Locality:
Rubtsovskoe Mine, Rubtsovsky District, Altai Krai, Russia
 Dimensions: (2.7 x 2.4 x 2.5 cm)
 Description:
 Viewed:  1146 Time(s)

copper af cuprite 2.jpg



copper af cuprite.jpg
 Mineral: Copper a/f Cuprite w/ Native Silver
 Locality:
Rubtsovskoe Mine, Rubtsovsky District, Altai Krai, Russia
 Dimensions: (2.7 x 2.4 x 2.5 cm)
 Description:
 Viewed:  1146 Time(s)

copper af cuprite.jpg



Chunky mimemite 2.jpg
 Mineral: Chunky Mimetite on Matrix
 Locality:
Mount Bonnie Mine, Grove Hill, Victoria Daly Regional Council, Katherine Region, Northern Territory, Australia
 Dimensions: (3.25 x 1.9 x 1.4 cm)
 Description:
 Viewed:  1147 Time(s)

Chunky mimemite 2.jpg



chunky mimemite.jpg
 Mineral: Chunky Mimetite on Matrix
 Locality:
Mount Bonnie Mine, Grove Hill, Victoria Daly Regional Council, Katherine Region, Northern Territory, Australia
 Dimensions: (3.25 x 1.9 x 1.4 cm)
 Description:
 Viewed:  1147 Time(s)

chunky mimemite.jpg



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Conor Quinlan | (Tucson, AZ)
(+20-Yrs) of Mineral Hunting Experience
Tucson Mineral Show Fanatic Since (1999)
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Tobi




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PostPosted: Jun 18, 2020 03:57    Post subject: Re: Best Finds of the Month!  

Superb mimetite crystals!
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Conor Quinlan




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PostPosted: Jun 18, 2020 14:43    Post subject: Re: Best Finds of the Month! (Kunzite + Tourmaline & Opal)  

Update (3 of 4) on "Best of Month" mineral specimens for June 2020:

5. Clear Kunzite w/ Bi-Colored Tourmaline:
Being an avid collector of specimens that exhibit multiple minerals I was delighted to discover this fantastic piece. Although the kunzite appears clear a very faint yellow tinge is visible & can be compounded when viewed from the correct angle. The kunzite is also nearly perfect structurally & most importantly adds an aesthetic appeal that's very unique & impossible to achieve with either mineral alone
The contrasting pink & green colors exhibited by the tourmaline are fairly vivid & have a high luster that gleams brightly when lit with lighting. All crystals are gemmy with great clarity & decently low levels of inclusions.

8. Iridescent Precious Opal in Silica Matrix:
Precious opal displays every color of the rainbow with great intensity. Exhibits green, yellow, blue & purple in lower light, then displays orange & red as light intensity increases. Opal completely fills every cavity reaching depths, as well as widths, of up to (2 cm) within & across the matrix. The largest estimated volume of almost solid opal = (2 x 1.5 x 1.5 cm). The inclusion of a silica based matrix made this piece even more appealing as a naturally sourced mineral specimen.



kunzite tourmaline .jpg
 Mineral: Spodumene (variety kunzite) and 'Tourmaline'
 Locality:
Dara-I-Pech District (Pech District), Konar Province (Kunar), Afghanistan
 Dimensions: 21 x 3.5 x 2.75 cm
 Description:
Kunzite & Bi-Colored Tourmaline
 Viewed:  1032 Time(s)

kunzite tourmaline .jpg



kunzite tourmaline 2.jpg
 Mineral: Spodumene (variety kunzite) and 'Tourmaline'
 Locality:
Dara-I-Pech District (Pech District), Konar Province (Kunar), Afghanistan
 Dimensions: (21 x 3.5 x 2.75 cm)
 Description:
Kunzite & Bi-Colored Tourmaline
Close-up of bi-colored tourmaline crystals on kunzite
 Viewed:  1034 Time(s)

kunzite tourmaline 2.jpg



kunzite & tourmaline 3.jpg
 Mineral: Spodumene (variety kunzite) and 'Tourmaline'
 Locality:
Dara-I-Pech District (Pech District), Konar Province (Kunar), Afghanistan
 Dimensions: (21 x 3.5 x 2.75 cm)
 Description:
Kunzite & Bi-Colored Tourmaline
Back side of the specimen which is only kunzite
 Viewed:  1032 Time(s)

kunzite & tourmaline 3.jpg



opal 2.jpg
 Mineral: Opal
 Locality:
Queensland, Australia
 Dimensions: (5.5 x 5 x 4 cm)
 Description:
Precious Opal in Silica Matrix
Close-up of precious opal veins in the silica based matrix
 Viewed:  1033 Time(s)

opal 2.jpg



opal 3.jpg
 Mineral: Opal
 Locality:
Queensland, Australia
 Dimensions: (5.5 x 5 x 4 cm)
 Description:
Precious Opal in Silica Matrix
 Viewed:  1037 Time(s)

opal 3.jpg



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Conor Quinlan | (Tucson, AZ)
(+20-Yrs) of Mineral Hunting Experience
Tucson Mineral Show Fanatic Since (1999)
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Conor Quinlan




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PostPosted: Aug 10, 2020 18:55    Post subject: Unique Ultra-Rare Silver Amalgam Specimen: Luanheite & Eugenite  

Although Silver Amalgams are ultra-rare in nature when they do occur they are generally quite dull in appearance & form in thin sheets.
However, this particular specimen exhibits a far more complex & thick structure, as well as a very unique, highly aesthetic, bronze patina in addition to the silver! More than likely a one-of-a-kind specimen!

(SEM) tested to verify the existence of both Luanheite as well as Eugenite by Prof. N. Rudashevsky (Signed Document w/ Labeled SEM Images).
Also found additional deposits of the following minerals:
Stephanie | Freibergite | Pyragyrite | Polybasite | Acantite | Sphalerite | Arsenopyrite | Limonite | Quartz



luanheite 2.jpg
 Mineral: Luanheite
 Locality:
Privol'noye Mine, Sakha Republic (Yakutia), Russia
 Dimensions: (5.9 x 3.3 x 1 cm)
 Description:
Front Side of the luanheite
 Viewed:  657 Time(s)

luanheite 2.jpg



luanheite .jpg
 Mineral: Luanheite
 Locality:
Privol'noye Mine, Sakha Republic (Yakutia), Russia
 Dimensions: (5.9 x 3.3 x 1 cm)
 Description:
Back Side of the luanheite
 Viewed:  660 Time(s)

luanheite .jpg



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Conor Quinlan | (Tucson, AZ)
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Peter Lemkin




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PostPosted: Aug 10, 2020 23:21    Post subject: Re: Unique Ultra-Rare Silver Amalgam Specimen: Luanheite & Eugenite  

Wow! Not only rare, but a nice and large specimen. Lucky you.
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James Catmur
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PostPosted: Aug 11, 2020 10:53    Post subject: Re: Unique Ultra-Rare Silver Amalgam Specimen: Luanheite & Eugenite  

Conor

I am not sure they are 'ultra-rare in nature' as I have a fair number in my collection. They are not common but there are far rarer minerals.

Have a look at this one on the Spanish side

https://www.foro-minerales.com/forum/viewtopic.php?p=151067#151067

James

Conor Quinlan wrote:
Although Silver Amalgams are ultra-rare in nature
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Tobi




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PostPosted: Aug 13, 2020 03:20    Post subject: Re: Best Finds of the Month! (Kunzite + Tourmaline & Opal)  

Conor Quinlan wrote:
Opal
Queensland, Australia
Dimensions: (5.5 x 5 x 4 cm)
Precious Opal in Silica Matrix
Gorgeous opal - I love it!!!
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