Tucson Gem, Mineral and Fossil Showcase - Flourite (spinal twinned) with Aquamarine and Quartz on Muscovite.

This is Flourite (spinal twinned) with Aquamarine and Quartz on Muscovite. Nagar, Hunza Valley, Gilgit-Baltistan, Pakistan.

en.wikipedia.org/wiki/Fluorite
Fluorite (also called fluorspar) is the mineral form of calcium fluoride, CaF2. It belongs to the halide minerals. It crystallizes in isometric cubic habit, although octahedral and more complex isometric forms are not uncommon.
The Mohs scale of mineral hardness, based on scratch hardness comparison, defines value 4 as fluorite.[6]
Pure fluorite is colourless and transparent, both in visible and ultraviolet light, but impurities usually make it a colorful mineral and the stone has ornamental and lapidary uses. Industrially, fluorite is used as a flux for smelting, and in the production of certain glasses and enamels. The purest grades of fluorite are a source of fluoride for hydrofluoric acid manufacture, which is the intermediate source of most fluorine-containing fine chemicals. Optically clear transparent fluorite lenses have low dispersion, so lenses made from it exhibit less chromatic aberration, making them valuable in microscopes and telescopes. Fluorite optics are also usable in the far-ultraviolet and mid-infrared ranges, where conventional glasses are too opaque for use.

Many samples of fluorite exhibit fluorescence under ultraviolet light, a property that takes its name from fluorite.[27]

en.wikipedia.org/wiki/Aquamarine_(gem)
Aquamarine is a pale-blue to light-green variety of beryl.[2] The color of aquamarine can be changed by heat (though this practice is frowned upon by collectors).[3]
Aquamarine has a chemical composition of Be3Al2Si6O18,[4] also containing Fe2+.[5] It has a hardness of 7.5–8 on the Mohs scale.[6] While aquamarine often contains no inclusions,[7] it can have them, noticeable or not, composed of content such as mica, hematite, or saltwater.[8]
The value of aquamarine is determined by its weight, colour,[4] cut, and clarity.[14] Due to its relative abundance, aquamarine is comparatively less expensive than other gemstones within the beryl group, such as emerald or bixbite (red beryl) but is typically more expensive than similarly coloured gemstones such as blue topaz.[7][9] Naturally occurring blue hued aquamarine specimens are more expensive than those that have undergone heat treatment to reduce yellow tones caused by ferric iron.[9] Cut aquamarines that are over 25 carats will have a lower price per carat than smaller ones of the same quality.[15]

On a personal note. My daughter is interested in gems, minerals, rocks, and stones. We took a daytrip to Tucson. It was our first time to the shows. There are actually something like 3 dozen shows around Tucson. We went to the Tucson Convention Center for about 3 hours and then to the Kino Sports Complex for about 1.5 hours. We had hoped to get to the 22nd St show and the GIGM Show on W. Starr Pass but did not have time. I wish I had bought my tickets in advance, it would have saved about 30-40 minutes of waiting in line at the Convention Center. I'm glad I brought a Circular Polarizer to cut some of the glare of the glass exhibit cases.

www.visittucson.org/tucson-gem-mineral-fossil-showcase/
"Every year the world-renowned Tucson Gem, Mineral & Fossil Showcase is like a time portal, a trip around the world, and a treasure hunt all rolled into one. Every winter, more than 65,000 guests from around the globe descend upon Tucson, AZ, to buy, sell, trade, and bear witness to rare and enchanting gems, minerals, and fossils at more than 40 gem show locations across the city. If you're planning a winter visit to Tucson, you won't want to miss this three-week-long event.
"Whether you’re looking for a $5 shimmering crystal necklace or a show-stopping $200,000 crystallized rock from an exotic location, the Tucson Gem, Mineral, & Fossil Shows have something for everyone.

www.visittucson.org/blog/post/gems-and-minerals/
www.tgms.org/show

TGMS 2024
Tucson Gem Show 2024

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Taken in: United States / Arizona / Arizona Trailer Court (show map)

Taken on: February 10, 2024

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Tucson Gem Mineral & Fossil Showcase

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Tucson Gem and Mineral Show

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Gem

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TGMS 2024

Flourite

spinal twinned

Aquamarine

Quartz

Muscovite

Nagar

Hunza Valley

Gilgit-Baltistan « less

Sets appears in: • Tucson Gem & Mineral Show 2024

Groups appears in: • Minerals and rocks and fossils • Arizona Wonders (up to 3 in a row) more » • Arizona Photographers Group • Earth Science Teaching Resource • Arizona Passages • Rocks-Fossils-Minerals • Minerals, Rocks, and Gems • Rocks, gems, pebbles, & stones • Most Beautiful Rocks and Minerals « less

Camera: Sony ILCE-7M4, f/8.0, 1/100 sec, 42mm, ISO 3200 (more info) (hide info)

Camera:	Sony ILCE-7M4
Lens:	FE 24-240mm F3.5-6.3 OSS
Aperture:	f/8.0
Exposure Time:	0.01 sec (1/100)
Focal Length:	42mm
ISO:	3200
Exposure Bias:	0 EV
Flash:	Off, Did not fire
Exposure Program:	Aperture-priority AE
Exposure Mode:	Auto
Metering Mode:	Multi-segment
White Balance:	Auto
Color Space:	sRGB
Software:	Adobe Photoshop Lightroom Classic 13.3.1 (Windows)
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