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Rocks, minerals & gems By Ren

A closer look at the ground we stand on.

Fresh finds, mineral science, gems, and the stories behind the specimens — for curious collectors and lifelong learners.

02 / The archive

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New Mineral Species Pyrope-(Mn) Discovered in Arizona

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Scientists announce a new mineral species, Pyrope-(Mn), identified in Arizona on July 3, 2026.

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Mantle Xenoliths Preserve Deep Water Signatures

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Scientists find mantle xenoliths retain deep-water signatures even after eruption.

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Scientists Discover New Niobium Mineral Xianhuaite‑(Ce)

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Researchers identified a new niobium mineral from China’s Bayan Obo deposit, revealing insights into the formation of rare‑earth and niobium ores.

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New Sapphire Deposit Discovered in Montana’s Rock Creek

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Belley and Broders discovered a substantial corundum deposit within rhyolitic ignimbrite at Rock Creek, Montana.

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National Geographic Launches Mega Fossil & Gemstone Dig Kit

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The new kit lets children excavate 20 real fossils and gemstones for hands‑on learning.

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Fine‑Grained Sapphires from Rock Creek Show Distinct Trace Elements

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Researchers Belley and Goodsuhm analyzed trace elements in fine‑grained sapphires from Rock Creek, Montana, revealing patterns linked to their geological formation.

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New Minerals Reported by European Journal of Mineralogy

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Three new mineral species were described in the latest issue of the European Journal of Mineralogy.

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Multistep Alteration of Fe²⁺‑Bearing Fluorophlogopite Revealed by In Situ Raman Spectroscopy

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In situ Raman spectroscopy shows that heating fluorophlogopite triggers potassium mobilization near 600 K, hydrogen delocalisation above 1100 K, and iron oxidation beyond 1300 K.

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New Niobium Mineral Xianhuaite‑(Ce) Found at China’s Bayan Obo Deposit

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Researchers identified a new niobium mineral, xianhuaite‑(Ce), at China’s Bayan Obo deposit, detailing its composition and structure and its implications for ore‑forming processes.

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Fluorine-Driven Melting Creates New Minerals in Finnish Marble

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A fluorine‑rich magma melts Lappeenranta marble, forming novel minerals.

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National Geographic Mega Fossil & Gemstone Dig Kit Unveiled

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A new educational kit lets children excavate 20 real fossils and gems guided by National Geographic experts.

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B‑Coordination Mapping Unlocks Granitic Glass Evolution

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Researchers reveal how boron bonds vary in granitic melts, enabling better tracking of magmatic–hydrothermal processes.

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