www.mineralcollection.eu/product/2137...
#beryl #cyclosilicates #silicates #norwegianminerals #norwayminerals #minerals #rocks #crystals #stones
#beryl #cyclosilicates #silicates #norwegianminerals #norwayminerals #minerals #rocks #crystals #stones
December 12, 2025 at 10:04 AM
www.mineralcollection.eu/product/2432...
Scawtite from the Crestmore quarries, Crestmore, California, USA
21 mm x 14 mm excl. box
6 gram incl. box
€ 15
#scawtite #silicates #cyclosilicates #systematicminerals #thumbnailminerals #micromounts #crestmore #californiaminerals #usminerals #minerals
Scawtite from the Crestmore quarries, Crestmore, California, USA
21 mm x 14 mm excl. box
6 gram incl. box
€ 15
#scawtite #silicates #cyclosilicates #systematicminerals #thumbnailminerals #micromounts #crestmore #californiaminerals #usminerals #minerals
September 26, 2026 at 3:09 PM
www.mineralcollection.eu/product/2432...
Scawtite from the Crestmore quarries, Crestmore, California, USA
21 mm x 14 mm excl. box
6 gram incl. box
€ 15
#scawtite #silicates #cyclosilicates #systematicminerals #thumbnailminerals #micromounts #crestmore #californiaminerals #usminerals #minerals
Scawtite from the Crestmore quarries, Crestmore, California, USA
21 mm x 14 mm excl. box
6 gram incl. box
€ 15
#scawtite #silicates #cyclosilicates #systematicminerals #thumbnailminerals #micromounts #crestmore #californiaminerals #usminerals #minerals
www.mineralcollection.eu/product/2348...
Tourmaline var. rubellite from the Haapaluoma pegmatite, Peräseinäjoki, Finland
2.5 cm x 1.4 cm exck, stand
10 gram incl. stand
€ 30
#rubellite #silicates #cyclosilicates #Haapaluoma #finnishminerals #thumbnailminerals #minerals #rocks #crystals #stones
Tourmaline var. rubellite from the Haapaluoma pegmatite, Peräseinäjoki, Finland
2.5 cm x 1.4 cm exck, stand
10 gram incl. stand
€ 30
#rubellite #silicates #cyclosilicates #Haapaluoma #finnishminerals #thumbnailminerals #minerals #rocks #crystals #stones
June 25, 2026 at 9:03 AM
www.mineralcollection.eu/product/2348...
Tourmaline var. rubellite from the Haapaluoma pegmatite, Peräseinäjoki, Finland
2.5 cm x 1.4 cm exck, stand
10 gram incl. stand
€ 30
#rubellite #silicates #cyclosilicates #Haapaluoma #finnishminerals #thumbnailminerals #minerals #rocks #crystals #stones
Tourmaline var. rubellite from the Haapaluoma pegmatite, Peräseinäjoki, Finland
2.5 cm x 1.4 cm exck, stand
10 gram incl. stand
€ 30
#rubellite #silicates #cyclosilicates #Haapaluoma #finnishminerals #thumbnailminerals #minerals #rocks #crystals #stones
www.mineralcollection.eu/product/2305...
Beryl var. emerald on biotite matrix from the Habach valley, Bramberg am Wildkogel, Austria
21 mm x 13 mm excl. box
11 gram incl. box
€ 25
#emerald #silicates #cyclosilicates #habachvalley #austrianminerals #minerals #rocks #crystals #stones
Beryl var. emerald on biotite matrix from the Habach valley, Bramberg am Wildkogel, Austria
21 mm x 13 mm excl. box
11 gram incl. box
€ 25
#emerald #silicates #cyclosilicates #habachvalley #austrianminerals #minerals #rocks #crystals #stones
May 12, 2026 at 6:58 PM
www.mineralcollection.eu/product/2305...
Beryl var. emerald on biotite matrix from the Habach valley, Bramberg am Wildkogel, Austria
21 mm x 13 mm excl. box
11 gram incl. box
€ 25
#emerald #silicates #cyclosilicates #habachvalley #austrianminerals #minerals #rocks #crystals #stones
Beryl var. emerald on biotite matrix from the Habach valley, Bramberg am Wildkogel, Austria
21 mm x 13 mm excl. box
11 gram incl. box
€ 25
#emerald #silicates #cyclosilicates #habachvalley #austrianminerals #minerals #rocks #crystals #stones
www.mineralcollection.eu/product/2433...
Sekaninaite from Dolni Bory (TL), Bory, Czech Republic
20 mm x 18 mm x 17 mm excl. stand
14 gram incl. stand
€ 30
#sekaninaite #silicates #cyclosilicates #systematicminerals #typelocality #thumbnailminerals #dolnibory #czechminerals #minerals #rocks
Sekaninaite from Dolni Bory (TL), Bory, Czech Republic
20 mm x 18 mm x 17 mm excl. stand
14 gram incl. stand
€ 30
#sekaninaite #silicates #cyclosilicates #systematicminerals #typelocality #thumbnailminerals #dolnibory #czechminerals #minerals #rocks
September 27, 2026 at 5:24 PM
www.mineralcollection.eu/product/2433...
Sekaninaite from Dolni Bory (TL), Bory, Czech Republic
20 mm x 18 mm x 17 mm excl. stand
14 gram incl. stand
€ 30
#sekaninaite #silicates #cyclosilicates #systematicminerals #typelocality #thumbnailminerals #dolnibory #czechminerals #minerals #rocks
Sekaninaite from Dolni Bory (TL), Bory, Czech Republic
20 mm x 18 mm x 17 mm excl. stand
14 gram incl. stand
€ 30
#sekaninaite #silicates #cyclosilicates #systematicminerals #typelocality #thumbnailminerals #dolnibory #czechminerals #minerals #rocks
I think cyclosilicates are pretty cool, and a copper cyclosilicate? Yes please. It's dioptase for me this round.
#MinCup25 Round 1 Match 10: It’s a green, green world for kiwi #Wavellite vs desert emerald #Dioptase.
Will it be revenge or a repeat in this rematch of the 2024 quarterfinals?
VOTE: www.mineralcup.org/2025/vote/r1...
Check results: www.mineralcup.org/2025/results...
Will it be revenge or a repeat in this rematch of the 2024 quarterfinals?
VOTE: www.mineralcup.org/2025/vote/r1...
Check results: www.mineralcup.org/2025/results...
Vote in Round 1 Match 10 — Mineral Cup
Click here to vote in Dioptase vs Wavellite Photo Credit: Smithsonian Institution
www.mineralcup.org
September 10, 2025 at 2:00 AM
I think cyclosilicates are pretty cool, and a copper cyclosilicate? Yes please. It's dioptase for me this round.
www.mineralcollection.eu/product/2284...
Fluor-uvite on magnesite from the Pomba pit, Brumado, Brazil
3.5 cm x 2 cm x 2 cm excl. box
23 gram incl. box
€ 30
#fluoruvite #magnesite #silicates #cyclosilicates #carbonates #pombapit #brumado #brazilianminerals #minerals #rocks #crystals #stones
Fluor-uvite on magnesite from the Pomba pit, Brumado, Brazil
3.5 cm x 2 cm x 2 cm excl. box
23 gram incl. box
€ 30
#fluoruvite #magnesite #silicates #cyclosilicates #carbonates #pombapit #brumado #brazilianminerals #minerals #rocks #crystals #stones
April 22, 2026 at 8:02 AM
www.mineralcollection.eu/product/2284...
Fluor-uvite on magnesite from the Pomba pit, Brumado, Brazil
3.5 cm x 2 cm x 2 cm excl. box
23 gram incl. box
€ 30
#fluoruvite #magnesite #silicates #cyclosilicates #carbonates #pombapit #brumado #brazilianminerals #minerals #rocks #crystals #stones
Fluor-uvite on magnesite from the Pomba pit, Brumado, Brazil
3.5 cm x 2 cm x 2 cm excl. box
23 gram incl. box
€ 30
#fluoruvite #magnesite #silicates #cyclosilicates #carbonates #pombapit #brumado #brazilianminerals #minerals #rocks #crystals #stones
www.mineralcollection.eu/product/2360...
Lepidolite on elbaite from the Pederneira mine, São José da Safira, Minas Gerais, Brazil
Heigth 2 cm excl. stand
3 gram incl. stand
€ 200
#lepidolite #elbaite #silicates #phyllosilicates #cyclosilicates #pederneira #brazilianminerals #thumbnailminerals
Lepidolite on elbaite from the Pederneira mine, São José da Safira, Minas Gerais, Brazil
Heigth 2 cm excl. stand
3 gram incl. stand
€ 200
#lepidolite #elbaite #silicates #phyllosilicates #cyclosilicates #pederneira #brazilianminerals #thumbnailminerals
July 9, 2026 at 9:45 AM
www.mineralcollection.eu/product/2360...
Lepidolite on elbaite from the Pederneira mine, São José da Safira, Minas Gerais, Brazil
Heigth 2 cm excl. stand
3 gram incl. stand
€ 200
#lepidolite #elbaite #silicates #phyllosilicates #cyclosilicates #pederneira #brazilianminerals #thumbnailminerals
Lepidolite on elbaite from the Pederneira mine, São José da Safira, Minas Gerais, Brazil
Heigth 2 cm excl. stand
3 gram incl. stand
€ 200
#lepidolite #elbaite #silicates #phyllosilicates #cyclosilicates #pederneira #brazilianminerals #thumbnailminerals
www.mineralcollection.eu/product/2347...
Tourmaline var. verdelite from Minas Gerais, Brazil
2.6 cm x 2cm excl. Stand
9 gram incl. stand
€ 35
#verdilite #greentourmaline #silicates #cyclosilicates #brazilianminerals #thumbnailminerals #minerals #rocks #crystals #stones
Tourmaline var. verdelite from Minas Gerais, Brazil
2.6 cm x 2cm excl. Stand
9 gram incl. stand
€ 35
#verdilite #greentourmaline #silicates #cyclosilicates #brazilianminerals #thumbnailminerals #minerals #rocks #crystals #stones
June 24, 2026 at 6:05 PM
www.mineralcollection.eu/product/2347...
Tourmaline var. verdelite from Minas Gerais, Brazil
2.6 cm x 2cm excl. Stand
9 gram incl. stand
€ 35
#verdilite #greentourmaline #silicates #cyclosilicates #brazilianminerals #thumbnailminerals #minerals #rocks #crystals #stones
Tourmaline var. verdelite from Minas Gerais, Brazil
2.6 cm x 2cm excl. Stand
9 gram incl. stand
€ 35
#verdilite #greentourmaline #silicates #cyclosilicates #brazilianminerals #thumbnailminerals #minerals #rocks #crystals #stones
www.mineralcollection.eu/product/2322...
Schorl in muscovite var. gilbertite from St Austell, Cornwall, England, UK
20 mm x 11 mm excl. box
5 gram incl. box
€ 6
#schorl #gilbertite #silicates #cyclosilicates #phyllosilicates #ukminerals #micromounts #thumbnails #minerals #rocks #crystals #stones
Schorl in muscovite var. gilbertite from St Austell, Cornwall, England, UK
20 mm x 11 mm excl. box
5 gram incl. box
€ 6
#schorl #gilbertite #silicates #cyclosilicates #phyllosilicates #ukminerals #micromounts #thumbnails #minerals #rocks #crystals #stones
Schorl in muscovite var. gilbertite from the UK – micromount thumbnail | MINERAL COLLECTION
Schorl in muscovite var. gilbertite from St Austell, Cornwall, England, UK20 mm x 11 mm excl. box5 gram incl. box
www.mineralcollection.eu
May 30, 2026 at 5:55 PM
www.mineralcollection.eu/product/2322...
Schorl in muscovite var. gilbertite from St Austell, Cornwall, England, UK
20 mm x 11 mm excl. box
5 gram incl. box
€ 6
#schorl #gilbertite #silicates #cyclosilicates #phyllosilicates #ukminerals #micromounts #thumbnails #minerals #rocks #crystals #stones
Schorl in muscovite var. gilbertite from St Austell, Cornwall, England, UK
20 mm x 11 mm excl. box
5 gram incl. box
€ 6
#schorl #gilbertite #silicates #cyclosilicates #phyllosilicates #ukminerals #micromounts #thumbnails #minerals #rocks #crystals #stones
Dioptase is stunningly beautiful, and I love cyclosilicates.
With that said, there's no choice in this matter. I'm just shocked that Zircon has never won the #MinCup before.
With that said, there's no choice in this matter. I'm just shocked that Zircon has never won the #MinCup before.
It's the #MinCup23 QUARTER-FINALS!!
Can resilient timekeeper #Zircon outlast its competition, or will the striking beauty of #Dioptase make it a clear winner?
Vote: www.mineralcup.org/2023/campaig...
Results: www.mineralcup.org/results/roun...
Feed: bsky.app/profile/loui...
Can resilient timekeeper #Zircon outlast its competition, or will the striking beauty of #Dioptase make it a clear winner?
Vote: www.mineralcup.org/2023/campaig...
Results: www.mineralcup.org/results/roun...
Feed: bsky.app/profile/loui...
Vote in Quarterfinal Match 1 — Mineral Cup
www.mineralcup.org
September 25, 2023 at 4:37 PM
Dioptase is stunningly beautiful, and I love cyclosilicates.
With that said, there's no choice in this matter. I'm just shocked that Zircon has never won the #MinCup before.
With that said, there's no choice in this matter. I'm just shocked that Zircon has never won the #MinCup before.
Schorl on beryl var. aquamarine from Klein Spitzkoppe, Spitzkoppe area, Namibia
28 mm x 13 mm excl. stand
10 gram incl. stand
€ 25
#schorl #aquamarine #silicates #cyclosilicates #kleinspitzkoppe #namibiaminerals #thumbnailminerals #minerals #rocks #crystals #stones
28 mm x 13 mm excl. stand
10 gram incl. stand
€ 25
#schorl #aquamarine #silicates #cyclosilicates #kleinspitzkoppe #namibiaminerals #thumbnailminerals #minerals #rocks #crystals #stones
September 18, 2026 at 8:32 AM
Schorl on beryl var. aquamarine from Klein Spitzkoppe, Spitzkoppe area, Namibia
28 mm x 13 mm excl. stand
10 gram incl. stand
€ 25
#schorl #aquamarine #silicates #cyclosilicates #kleinspitzkoppe #namibiaminerals #thumbnailminerals #minerals #rocks #crystals #stones
28 mm x 13 mm excl. stand
10 gram incl. stand
€ 25
#schorl #aquamarine #silicates #cyclosilicates #kleinspitzkoppe #namibiaminerals #thumbnailminerals #minerals #rocks #crystals #stones
www.mineralcollection.eu/product/2421...
Rubellite in matrix from the Otjua mine, Otjua Farm 37, Namibia
25 mm x 25 mm x 20 mm excl. stand
15 gram incl. stand
€ 30
#rubellite #silicates #cyclosilicates #otjua #namibianminerals #thumbnailminerals #minerals #rocks #crystals #stones
Rubellite in matrix from the Otjua mine, Otjua Farm 37, Namibia
25 mm x 25 mm x 20 mm excl. stand
15 gram incl. stand
€ 30
#rubellite #silicates #cyclosilicates #otjua #namibianminerals #thumbnailminerals #minerals #rocks #crystals #stones
September 16, 2026 at 8:25 AM
www.mineralcollection.eu/product/2421...
Rubellite in matrix from the Otjua mine, Otjua Farm 37, Namibia
25 mm x 25 mm x 20 mm excl. stand
15 gram incl. stand
€ 30
#rubellite #silicates #cyclosilicates #otjua #namibianminerals #thumbnailminerals #minerals #rocks #crystals #stones
Rubellite in matrix from the Otjua mine, Otjua Farm 37, Namibia
25 mm x 25 mm x 20 mm excl. stand
15 gram incl. stand
€ 30
#rubellite #silicates #cyclosilicates #otjua #namibianminerals #thumbnailminerals #minerals #rocks #crystals #stones
www.mineralcollection.eu/product/2396...
Cordierite from Bamble, Telemark, Norway
6.5 cm x 4.5 cm
130 gram
€ 40
#cordierite #silicates #cyclosilicates #bamble #norwegianminerals #minerals #rocks #crystals #stones
Cordierite from Bamble, Telemark, Norway
6.5 cm x 4.5 cm
130 gram
€ 40
#cordierite #silicates #cyclosilicates #bamble #norwegianminerals #minerals #rocks #crystals #stones
August 21, 2026 at 9:09 AM
www.mineralcollection.eu/product/2396...
Cordierite from Bamble, Telemark, Norway
6.5 cm x 4.5 cm
130 gram
€ 40
#cordierite #silicates #cyclosilicates #bamble #norwegianminerals #minerals #rocks #crystals #stones
Cordierite from Bamble, Telemark, Norway
6.5 cm x 4.5 cm
130 gram
€ 40
#cordierite #silicates #cyclosilicates #bamble #norwegianminerals #minerals #rocks #crystals #stones
www.mineralcollection.eu/product/2259...
#emerald #cyclosilicates #austrianminerals #minerals #rocks #crystals #stones
#emerald #cyclosilicates #austrianminerals #minerals #rocks #crystals #stones
March 28, 2026 at 1:12 PM
www.mineralcollection.eu/product/2389...
Catapleiite and aegirine from the Narssârssuk pegmatite, Igaliku, Greenland
17 mm x 9 mm excl stand
3 gram incl. stand
€ 30
#catapleiite #aegirine #silicates #cyclosilicates #inosilicates #narssârssuk #greenlandminerals #thumbnailminerals #systematicminerals
Catapleiite and aegirine from the Narssârssuk pegmatite, Igaliku, Greenland
17 mm x 9 mm excl stand
3 gram incl. stand
€ 30
#catapleiite #aegirine #silicates #cyclosilicates #inosilicates #narssârssuk #greenlandminerals #thumbnailminerals #systematicminerals
August 13, 2026 at 5:41 PM
www.mineralcollection.eu/product/2389...
Catapleiite and aegirine from the Narssârssuk pegmatite, Igaliku, Greenland
17 mm x 9 mm excl stand
3 gram incl. stand
€ 30
#catapleiite #aegirine #silicates #cyclosilicates #inosilicates #narssârssuk #greenlandminerals #thumbnailminerals #systematicminerals
Catapleiite and aegirine from the Narssârssuk pegmatite, Igaliku, Greenland
17 mm x 9 mm excl stand
3 gram incl. stand
€ 30
#catapleiite #aegirine #silicates #cyclosilicates #inosilicates #narssârssuk #greenlandminerals #thumbnailminerals #systematicminerals
www.mineralcollection.eu/product/1827...
#beryl #smokeyquartz #torrington #cyclosilicates #silicates #australianminerals #mineralsaustralia
#beryl #smokeyquartz #torrington #cyclosilicates #silicates #australianminerals #mineralsaustralia
March 12, 2025 at 10:39 AM
www.mineralcollection.eu/product/2412...
Labuntsovite from the Kovdor Zheleznyi Mine (TL) , Kovdor Massif, Russia
20 mm x 17 mm excl. stand
4 gram incl. stand
€ 30
#labuntsovite #silicates #cyclosilicates #kovdor #russianminerals #typelocality #thumbnailminerals #mienrals #rocks #crystals #stones
Labuntsovite from the Kovdor Zheleznyi Mine (TL) , Kovdor Massif, Russia
20 mm x 17 mm excl. stand
4 gram incl. stand
€ 30
#labuntsovite #silicates #cyclosilicates #kovdor #russianminerals #typelocality #thumbnailminerals #mienrals #rocks #crystals #stones
September 7, 2026 at 5:04 PM
www.mineralcollection.eu/product/2412...
Labuntsovite from the Kovdor Zheleznyi Mine (TL) , Kovdor Massif, Russia
20 mm x 17 mm excl. stand
4 gram incl. stand
€ 30
#labuntsovite #silicates #cyclosilicates #kovdor #russianminerals #typelocality #thumbnailminerals #mienrals #rocks #crystals #stones
Labuntsovite from the Kovdor Zheleznyi Mine (TL) , Kovdor Massif, Russia
20 mm x 17 mm excl. stand
4 gram incl. stand
€ 30
#labuntsovite #silicates #cyclosilicates #kovdor #russianminerals #typelocality #thumbnailminerals #mienrals #rocks #crystals #stones
Volker Kahlenberg et al.: K0.72Na1.71Ca5.79Si6O19 – the first oligosilicate based on [Si6O19]-hexamers and its stability compared to cyclosilicates ##Si6O19Units##Oligosilicate@UniInnsbruck@univienna@UniInnsbruck...##IUCrhttps://journals.iucr.org/paper?S2052520624007352
K0.72Na1.71Ca5.79Si6O19 – the first oligosilicate based on [Si6O19]-hexamers and its stability compared to cyclosilicates
The first example of a silicate based on [Si6O19] oligomers is described in detail. The relative stability of [Si6O19] units compared to cyclic [Si6O18] rings is discussed using concepts from the electronegativity equalization method.
journals.iucr.org
September 3, 2024 at 12:00 AM
Volker Kahlenberg et al.: K0.72Na1.71Ca5.79Si6O19 – the first oligosilicate based on [Si6O19]-hexamers and its stability compared to cyclosilicates ##Si6O19Units##Oligosilicate@UniInnsbruck@univienna@UniInnsbruck...##IUCrhttps://journals.iucr.org/paper?S2052520624007352