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PhotosGormanite - Big Fish River, Dawson Mining District, Yukon, Canada

4th Oct 2016 21:02 UTCRichard Gunter Expert

How was this sample determined? The green bow-tie aggregate on the left is probably Gormanite but the platy green aggregate in the right side is probably in the Kulanite-Penikisite series. Gormanite is never platy.

4th Jan 2017 22:24 UTCRob Woodside 🌟 Manager

Message sent

5th Jan 2017 01:30 UTCRod Tyson Expert

Good observation on Richard's part -- the entire cluster is kulanite.

5th Jan 2017 16:45 UTCChristophe Boutry Expert

Hello Richard


Visual identification of this sample, and sold as Gormanite during Mineral Show .


I will correct the picture. Thank you for your help


Ch. Boutry

5th Jan 2017 17:36 UTCRichard Gunter Expert

Hi Christophe:


Kulanite is visually the most variable phase at RC-BFR. Compounding the problem is that Gormanite and Kulanite can be very similar in colour and on occasion, such as the Bobdownsite paragenesis, they can occur together. In that case the platy Kulanite crystals grow at right angles to the Gormanite blades.
 
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