HeyJaredMineral Matters
Hi there. I am a mineral enthusiast, artist, photographer and publisher. I believe in the importance of sharing information about minerals and related subjects. Mineral Matters is one way of doing this.
- Indexed issues, last 90 days
- 28
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- Oct 1, 2026
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- Sep 3, 2026
Latest issues
Castle Hill, New Zealand (opens the original)
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Castle Hill, known traditionally in te reo Māori as Kura Tāwhiti (“treasure from afar”), is located in the Waimakariri Basin along State Highway 73 (Arthur’s Pass route), the road between Christchurch and Greymouth, South Island, New Zealand. Its iconic tors, domes, and monoliths form one of New Zealand’s most celebrated karst landscapes.Castle Hill limestone is overwhelmingly calcitic (CaCO3). It is non-dolomitic (or has only negligible trace amounts of magnesium substitution), composed of pur
The specimens we collect and the people we meet (opens the original)
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Jon Mommers is a Melbourne based collector and a friend of mine, and who operates the PJ Mineral Sales Facebook Group. He recently posted about “the specimens we collect and the people we meet”. So much of what he wrote is true. His post deserves to be shared more widely…“Hello everyone,A mineral might be what first catches our eye, but it is often the people we meet through collecting who give us another reason to stay involved. A conversation across a sales table, someone taking the time to ex
New finds, old labels and off to Rijswijk (opens the original)
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Rolf Egberink’s September 2026 edition of the Stapel van Stenen newsletter is now out.Highlights include:Recent Events & Specimen AcquisitionsMaastricht Natural History Museum Family Day: Rolf hosted an interactive identification table for nearly 2,000 visitors on August 23, examining visitors’ rocks and demonstrating mineral fake/imitation examples (“belazerite”).Roman Dodecahedron & Pyritohedron Connection: A visit to Centre Céramique featured a reconstructed Roman dodecahedron from the King W
Chasing Down the Old Riordan Quarry (opens the original)
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I have a specimen of tridymite labelled as coming from the Old Riordan Quarry collected by Dick Haslam. Dick is now in his 90s, and was actively collecting into his 80s.This Mineral Matters post documents the process of attempting to find out where the Old Riordan Quarry actually is (or was).The Riordan Family Quarrying LegacyThe Riordan family operated extractive industry sites across Colac and the surrounding Western District of Victoria for roughly 70 years, beginning as Riordan Bros. in the
Minerals, Volume 16, Issue 9 (opens the original)
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Minerals, Volume 16, Issue 9 is now out, and available here.There are a couple of interesting articles.This first one looks at Copper-Bearing (“Paraíba”) Tourmaline from Abuloo, Ethiopia.The study evaluates seven tourmaline specimens to determine their mineralogical composition, cause of colouration, and gemmological classification. Testing confirmed all seven samples as elbaite, with several containing significant concentrations of copper (up to 2.29 wt%) and iron (up to 0.81 wt%). Visible abso
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