Welcome to the IGS Forums! Please note that you'll need to create an account to participate in these forums. Please read our brief Forum Rules and Etiquette.
Show More Information
Forums Home » General Gem-Related Discussion

Mini-Quiz for October 1st Newsletter

This topic contains 4 replies, has 5 voices, and was last updated by Profile photo of frans frans 11 months, 4 weeks ago.

Viewing 5 posts - 1 through 5 (of 5 total)
  • Author
    Posts
  • #200032
    Profile photo of msalguero
    msalguero
    Participant

    You are looking at a red gem in the polariscope and see fine lines crossed at 90 degrees. You are probably looking at:

    a) A singly refractive gem
    b) A synthetic gem
    c) Silk inclusions

    #200044
    Profile photo of happyduck
    happyduck
    Participant

    I should say : most probably a synthetic gem

    #200046
    Profile photo of harsono
    harsono
    Participant

    b. a synthetic gem – the lines indicates internal strain.

    #200047
    Profile photo of rpentney
    rpentney
    Participant

    silk inclusions

    #200089
    Profile photo of frans
    frans
    Participant

    ) A synthetic gem

Viewing 5 posts - 1 through 5 (of 5 total)

You must be logged in to reply to topics in this forum.


Take your love of gemstones
To a New Level
Search in radius 25 miles

Recent Community Posts

eNews Signup

Skip to toolbar