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User contributions for Studzinski.daniel

A user with 15 edits. Account created on 22 April 2013.
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7 July 2019

25 May 2017

19 May 2017

14 January 2017

10 January 2017

9 January 2017

12 November 2014

  • 19:5719:57, 12 November 2014 diff hist −8 m Corundum pigeon-blood-red is not a correct gemological term, it is a marketing term. we don't kill pigeons to compare the colours. Red is well defined colour with 620–740nm wave length. the same is with "cornflower blue"

11 December 2013

22 April 2013