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mastodon.scot is one of the many independent Mastodon servers you can use to participate in the fediverse.
A server intended for (but not limited to) users in Scotland or who identify as Scottish.

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Nadine, Hunter of Rocks 💎

Cinnabar has a slight lead over quartz and I'm not happy about that! This is the start of a *long* thread for #TeamQuartz which I'll be updating throughout the day.

Quartz is my all time favourite mineral. Despite its simple formula (SiO2), it can be found in a variety of colours and morphologies 1/?

Vote for quartz here: mineralcup.org/2023/campaigns/

#MinCup23 #minerals #mineral #quartz @MineralCup

Several crystals of pale purple amethyst rising out of a groundmass. The crystals are hexagonal prisms with pointed pyramidal tips.
A lump of colourless and transparent quartz filled with black needles of tourmaline. Label text: Quartz enclosing long needle-like tourmaline crystals. Locality unknown.
A big, round hollow rock (geode). The vanity is filled with white quartz crystals, and around the outer rims are grey coloured bands of agate.
A brown polished slab of tiger's eye showing an optical effect called chatoyancy, where there are bands of gold which appear to glow.
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Nadine, Hunter of Rocks 💎

A fact for the #etymology nerds! The word quartz describes one of its physical properties. It comes from the German word "Quarz" which has origins in various Slavic words for "hard" (e.g., Czech "tvrdý", Polish "twardy", Serbian/Croatian "tvrd"). Quartz is a pretty hard mineral as it's 7 on the Mohs hardness scale

#mineral #minerals #MinCup23 #TeamQuartz @MineralCup 2/?

The Mohs hardness scale. The left column shows the hardness of minerals: Talc is 1, gypsum is 2, calcite is 3, fluorite is 4, apatite is 5, orthoclase is 6, quartz is 7, topaz is 8, corundum is 9, diamond is 10. The right hand column shows the hardness of various everyday objects: A fingernail is 2.5, a copper penny is 3.5, a knife/glass plate is 5.5, a steel nail is 6.5, a masonry drill bit is 8.5.
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