Browsing by Subject "Crystal growth"
Now showing items 1-7 of 7
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How amethyst cathedrals form
(St. Croix Rockhounds, Stillwater, MN, 2007) -
How fast can crystals grow?
(St. Croix Rockhounds, Stillwater, MN, 2004) -
How Fast Did That Crystal Grow? Quantifying the Growth Rate of Natural Quartz Crystals
(2010-04)Circulation of hydrothermal fluids controls the timescales of cooling in the Earth's crust and allows for large-scale exchange of matter between different levels of the crust. The time required to grow quartz crystals ... -
Rhombohedral vs. Prism Sector Zones in Hydrothermal Quartz Crystals : Implications for Growth Dynamics
(2019-05)Gemmy hydrothermal quartz crystals typically exhibit each of their six prism and six rhombohedral crystal faces. However, discerning which of the crystal faces were actively growing at any given time during construction ... -
Why do such large crystals form in pegmatites?
(St. Croix Rockhounds, Stillwater, MN, 1987) -
Why pyrite crystals have different shapes
(St. Croix Rockhounds, Stillwater, MN, 1994)