|
|
|
|
| ||
Diamond Jewelry Forums
 Picture Gallery
 Video Gallery
 Journal
|
|||
|
|  Search
|  Posted Today
|  Most Active
|  Help
|
||
 »
Home
»  » Diamond Prices and Grading »
 » RockyTalky
»  » Levels of pressure-sensitivity in feather inclusions?
|
|
 |
Levels of pressure-sensitivity in feather inclusions? |
 |
| P: 10/8/2008 12:02:28 AM | |
Finally! Rough Rock Total Posts: 70 Last Post: 5/23/2009 Member Since: 7/3/2008 |
You may recall that I was investigating a 60:60 stone from BN that got an HCA score of 1.3. I specifically asked to have the stone checked to see if the long feather in the pavilion plot touches the girdle, which I learned here could indicate that the stone could be pressure-sensitive. Turns out, it is. They told me that the stone rates a "2" on pressure sensitivity, with "4" being something they would have rejected. They said that BN will sell "2" and "3"-level pressure sensitive stones. I've ruled this stone out because it has only MB Fluor, but I'm still curious about this concept of grading pressure-sensitivity. What do you folks think of this? Is this a BN thing? Do prongs apply pressure in the direction that could extend the feather or break the stone? |
| Posted: 10/8/2008 12:02:28 AM | |
|
There are 1 replies to this message. There are 1 replies on this page. |
|
| P: 10/8/2008 3:03:59 AM | |
Garry H (Cut Nut) Ideal Rock Total Posts: 11,579 Last Post: 11/23/2009 Member Since: 8/16/2000 |
Date: 10/8/2008 12:02:28 AM Diamonds, especially center stones, rarely break when setting. Once set, the feather on the pavilion side would not be any sort of risk. But a high 4 prong setting would be silly.
Author:Finally! You may recall that I was investigating a 60:60 stone from BN that got an HCA score of 1.3. I specifically asked to have the stone checked to see if the long feather in the pavilion plot touches the girdle, which I learned here could indicate that the stone could be pressure-sensitive. Turns out, it is. They told me that the stone rates a '2' on pressure sensitivity, with '4' being something they would have rejected. They said that BN will sell '2' and '3'-level pressure sensitive stones. I've ruled this stone out because it has only MB Fluor, but I'm still curious about this concept of grading pressure-sensitivity. What do you folks think of this? Is this a BN thing? Do prongs apply pressure in the direction that could extend the feather or break the stone? Garry Holloway FGAA DipDT |
| Posted: 10/8/2008 3:03:59 AM | |
 Previous Page
|
Next Page 
|
| « Here's what kills me about asscher cut/pricing... « | » Color Question ( H vs. I ) » |
Contact Us | Back Home | Privacy Statement | Forum Agreement | Forum Policies | |
| Ideal BB Version: 0.1.5.4.beta1 | Message forum software powered by the Ideal BB |
| |
Pricescope -
Knowledge -
Diamond Prices -
Tools -
Resources -
About
© 2000-2009 Pricescope. Terms of Use Privacy Policy Disclaimer
forum archives
