Mineral: Quartz
Locality: Cabiche, Quípama, Boyacá Department, Colombia
Dimensions: 70 x 72 x 49 mm

Description: The tips have "fibrous" inclusions or "tubes". At first the inclusions of the more yellow tipped ones were thought to be Humboldtine, but as these are found in a soil full of limonite and cleaned with oxalic acid that probably caused the appearance of Humboldtine. Now many seem to refer to the inclusion as Halloysite, tho I haven't seen the "proof". Some just call them "Mango quartz" due to the yellow, which I guess is "safer" than naming a mineral that one is unsure of.

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