Best Fibrous
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Actinolite is an amphibole silicate mineral named in 1794, notable for its fibrous habit that produces the valuable green gemstone known as nephrite jade.
Tiger's eye is a chatoyant gemstone belonging to the quartz group, famous for its golden-brown bands of light and historically mined in South Africa.
Hawk's eye is a blue-gray variant of tiger's eye quartz notable for its chatoyant optical phenomenon, primarily sourced from the Griqualand West region of South Africa.
Dumortierite is a fibrous aluminum borosilicate mineral first described in 1881 from specimens found in France, prized for its deep blue color.
Plancheite is a hydrated copper silicate mineral first described in 1908, notable for its blue color and fibrous crystal habit, primarily found in Congo.
