David Gonzalez

2 Questions 12 Answers 0 Followers

Questions related from David Gonzalez

Can this acicular-fibrous blue mineral can be Na-Amphibole or a phylosilicate?

It has pleocrhoism in green and blue (3rd picture), extinction angle very close to zero but the interference colours are not seen because of the mineral's strong colour, it is found in a trachyte....

09 September 2017 1,573 12 View

Can someone tell me if this can be a tourmaline crystal?

It fits with tourmaline description but I am concerned about its shape.

09 September 2015 9,719 39 View