Quartz Cluster
Crystal points grown together on their matrix — the classic pocket find, from single points to full clustered plates.
Specimen type · illustratedA lifetime of walking the Great Lakes shores with a pack, a pick, and an eye for what the water turned up. By day it’s gravel bars and fossil beds. By night, under a 365nm light, the same shoreline tells a second story — in glow.
✉ Email the Rockhound Ask what’s on the table — specimens, hunts, and gearSome minerals keep a second color hidden until the light changes. Under an ordinary lamp a fluorite cube looks quiet — grey-violet, nothing special. Put a 365nm ultraviolet light on it in the dark and it answers back in glowing green and violet. That’s fluorescence, and it changes how you hunt: after sunset, a shoreline that looked picked-over all day lights up with everything the daylight hid. Night hunting with a UV light isn’t a gimmick — it’s a second shoreline.
Not every stone answers — that’s the hunt. Fluorite, some calcites, and a roll of other minerals fluoresce; the rest stay dark, and the dark ones are often the better daylight finds anyway. A good UV light, a dark shore, and patience.
These are the types the Rockhound hunts and collects along the lakes. The board is a field guide, not a shelf list — what’s actually on the table changes with every hunt. See something you’re after? Ask what’s on the table — specimens and hunts are arranged by inquiry, and the pictures here are specimen types, drawn for the board.
Crystal points grown together on their matrix — the classic pocket find, from single points to full clustered plates.
Specimen type · illustratedBanded chalcedony out of the big lake’s gravel — rust-red and cream rings, cut and polished to show the fortification bands.
Specimen type · illustratedGlass-clear cubes in purple and green. Pretty in daylight — and the star of the night hunt, as the UV story above shows.
Specimen type · illustratedFossil coral from the northern lakes — the hexagon pattern only shows when the stone is wet or polished. Michigan’s own.
Specimen type · illustratedNative copper out of the old copper country — nuggets and float pieces with the green beginning to bloom on them.
Specimen type · illustratedQuartz wearing purple — points and small clusters out of the north shore country, from pale lilac to deep grape.
Specimen type · illustratedThe gear this board stands behind, starting with the light that makes the night hunt. Order by inquiry today — write us and we’ll arrange it. Prices are estimate bands.
The night-hunt light — true 365nm ultraviolet for fluorescence work, not the purple toy-store kind. Makes fluorite and its kin answer back.
The pair-sell with the light — eye protection rated for ultraviolet work, worn whenever the 365nm lamp is on.
A proper geological pick with a belt sheath — the tool that’s in the Rockhound’s hand in half the stories on this board.
The hobby’s big starter — barrel, motor, and grit stages to take rough shore stone to a polished finish at home.
What glows, what doesn’t, and where to look — a pocket guide to fluorescent minerals and the Michigan shore, light enough to live in the pack.
Ordering is by email inquiry while our checkout is being wired — prices above are estimates, confirmed when you write.
Great Lakes Rockhound is a lifelong rock collector out of Michigan who hunts the Great Lakes — the gravel bars, the old copper country, the fossil beds, and the dark shorelines after the crowds go home. This site is his board: the specimens he hunts, the hunts themselves, and the gear that earns its place in the pack. Everything here starts the same way — with an email asking what’s on the table.
Specimens, hunts, and gear all start with one email. Tell us what you’re after:
✉ Email the Rockhound Ask what’s on the table