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

Cutting Angles (Zircon)

This topic contains 0 replies, has 1 voice, and was last updated by Profile photo of nontavitch nontavitch 10 months, 3 weeks ago.

Viewing 1 post (of 1 total)
  • Author
  • #200657
    Profile photo of nontavitch

    Now I’m just confused. I’ve always been told & read to make your Pavilion angles 1.5-3 degrees above CA, so the light will not just exit & cause windowing. Not as clear on the Crown angles, but I’ve always assumed that it should be slightly below the CA, so as to let the light go thru to the Pavilion angles, except on the outside, where they should be higher to more or less “Capture the light in the stone.
    Have a piece of Zircon. 1st of all I’ve seen 2 different CA’s (30.4 & 34) (Which do I have ??). Also, been reading where people have said NOT to do 33 or 36 degree pav cuts because it causes “Tilt Windowing”? and to do 39-40 degrees?? Then on the Crown, I would normally do 28-32 degrees to make sure the light gets thru.? HELP! Can someone help me out here? & elaborate on the Why’s. What angles should I be using for this Zircon?
    Is there a list that shows preferred angles to use?


Viewing 1 post (of 1 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