Strzegom Fluorite
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Strzegom Fluorite

Fluorite

Strzegom, Lower Silesian Voivodeship, Poland

CaF2, Isometric

max. 26mm

An example of scarce and prized material from Grabina quarries located in pegmatites of Strzegom-Sobótka massif. This particular specimen is relatively sizeable and shows the range of violets one may expect from the material from this locality. It is an octahedral floater with minor damages, exhibiting typical, fine crystallisation with visible growth figures.

u/ulikowski — 14 hours ago
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Cactus Quartz

Quartz var. Cactus Quartz

Boekenhouthoek, Mpumalanga, South Africa

SiO2, Trigonal

max. 32mm

An example of cactus quartz variety where a central crystal is covered with smaller, outward-pointing crystals of a second generation. This particular specimen is heavily included with iron ions of various oxidation levels resulting in colour zoning with sharp contrast between lilac amethyst and rusty citrine.

u/ulikowski — 8 days ago

La Barre Fluorite

Fluorite

La Barre Mine, Puy de Dôme, France

CaF2, Isometric

max. 19mm

An excellent example of zoned fluorite from a famous, French locality. This specimen features a bright, yellow core and deep blue and purple bands. The crystal is complete on 3 faces and the remaining 3 show recrystallisation.

u/ulikowski — 15 days ago

La Barre Fluorite

Fluorite

La Barre Mine, Puy de Dôme, France

CaF2, Isometric

max. 19mm

An excellent example of zoned fluorite from a famous, French locality. This specimen features a bright, yellow core and deep blue and purple bands. The crystal is complete on 3 faces and the remaining 3 show recrystallisation.

u/ulikowski — 15 days ago
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Mint-green Prehnite

Prehnite

Djouga diggings, Kayes Region, Mali

Ca2Al(Si2Al)O10(OH)2

max. 19mm

Two intersecting botryoidal groupings of prehnite crystals.

u/ulikowski — 21 days ago
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Rubellite

Tourmaline var. Rubellite

Ankarinarivo Pegmatite, Vakinankarata, Madagascar

Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)4, Trigonal

max. 23mm

An excellent example of malagasy elbaite. This particular specimen stands out thanks to both its quality and unusual, tabular shape.

u/ulikowski — 28 days ago
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Aqua on Fluorite

Beryl var. Aquamarine on Fluorite

Erongo Mountains, Erongo, Namibia

Be3Al2(Si6O18), Hexagonal | CaF2, Isometric

max. 24mm

A specimen representing an uncommon mineral association of a terminated, highly saturated aquamarine and a bicolour, cubic fluorite.

u/Then_Marionberry_259 — 1 month ago
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Verdelite

Tourmaline var. Verdelite

Skardu Area, Gilgit-Baltistan, Pakistan

Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)4, Trigonal

max. 28mm

An example of a bicolour, doubly terminated elbaite crystal with green body and pale, bluish terminations from one of the classic localities.

u/ulikowski — 1 month ago
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Garnet var. Spessartine on Quartz var. Smoky

Edit: the title should list spessartine as a species not a variety

Garnet sp. Spessartine on Quartz var. Smoky

Wushan Spessartine Sites, Fujian, China

(Mn2+)3Al2(SiO4)3, Isometric | SiO2, Trigonal

max. 32mm

A specimen representing the classic association of spessartine garnets and smoky quartz from the famous, chinese locality. This particular piece features a number of golden and orange, gemmy spessartine crystals sprinkled atop a perfectly water-clear smoky quartz crystal and is belived to have come from the earliest site production (1998-2001). Once abundant in the market, currently this type of specimens is limited to releases from collections as the site is now within the borders of a national park.

Please note that the use of "Wushan Spessartine Sites" insted of "Wushan Spessartine Mine" for the locale name is deliberate and not a mistake. Given unclear factual status of this locality production, it is more likely to reflect actual conditions of specimens being collected across several sites scattered around the Wu mountain area insted of being mined in a singular mine.

u/ulikowski — 2 months ago
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Hourglass amethyst

Quartz var. Amethyst

Boudi, Souss-Massa, Morocco

max. 25mm

SiO2, Trigonal

A pefectly TN-sized example of hourglass amethyst from one-of-a-kind locale in the Central Anti-Atlas massif.

u/ulikowski — 2 months ago
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Okorusu Fluorite

Fluorite

Okorusu, Namibia

max. 21mm

CaF2, Isometric

An example of relatively new production from Namibian mine Okorusu. Most desirable specimens exhibit a crosslike colour zoning; with purple hearts contrasting sharply against mint green bodies of crystals and deep blue bands towards the outer edges.

u/ulikowski — 2 months ago

Malachite

Malachite

Katanga, DR Congo

max. 28mm

Cu2(CO3)(OH)2, Monoclinic

Two intertwined malachite stalactites from Congolese region of Katanga typically associated with the species.

u/ulikowski — 2 months ago
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Quartz var. Amethyst

Quartz var. Amethyst

Vera Cruz, Mexico

Vera Cruz is a classic locality for ametysths. However, this particular piece has the aesthetics to make it worth my collection which truly appreciates the beauty and uniqueness. Perfectly shaped crystals forming a V just hit the spot.

u/ulikowski — 3 months ago

Corundum var. Sapphire

Corundum var. Sapphire

Niwitigalla, Ratnapura, Sri Lanka

max. 26mm

Al2O3, Trigonal

This peculiar specimen of a sapphire from a classic lacality present an extremely unusual pattern of growth resulting in multiple "bends" of crystal axis. The multigenerational growth exhibits a certain repetition of conditions with crystals being bright yellow in the beginning and turning deep, dark blue at their terminations.

u/ulikowski — 3 months ago

Corundum var. Sapphire

Corundum var. Sapphire

Niwitigalla, Ratnapura, Sri Lanka

max. 26mm

Al2O3, Trigonal

This peculiar specimen of a sapphire from a classic lacality present an extremely unusual pattern of growth resulting in multiple "bends" of crystal axis. The multigenerational growth exhibits a certain repetition of conditions with crystals being bright yellow in the beginning and turning deep, dark blue at their terminations.

u/ulikowski — 3 months ago