collapse

Author Topic: Hessonite Garnet  (Read 109 times)

Moth

  • ALF'er Silver Member
  • *
  • Posts: 60
    • View Profile
Hessonite Garnet
« on: February 15, 2021, 11:34:02 AM »
Presented with a SRB of about 2.5 carat, with light behind it shows a bright yellow/orange but without direct illumination it is a dark brownish colour.  The owner has been ripped off with a couple of cut and rough stone purchases in the past.  I am thinking it is a hessonite garnet, which has been cut with an ineffective pavilion - perhaps too deep for proper refraction (it is obviously not too shallow as there is no possibility whatsoever of windowing). I have just recut a Sri Lankan Blue for him (worst cut stone I have ever seen - managed to recover 1.2 ct from 1.95 ct in a total recut) and he wants me to have a go at this. Now although the R/I for H/Garnet is at 1.73 thus is not that much different to Sapphire - and a good sapphire pavilion angle is around 42 I am wondering if I should lower that angle to around 40 to cut a shallower pavilion for better refraction - appreciate any thoughts.

Moth

  • ALF'er Silver Member
  • *
  • Posts: 60
    • View Profile
Re: Hessonite Garnet
« Reply #1 on: February 15, 2021, 12:08:00 PM »
Sorry - also thinking I might be able to get some more 'character' into the stone by increasing the pavilion mains and breaks from 8 to 16, of course mirrored in the crown.

Tags: Advice sought 
 

* Donations

The Aussie Lapidary Forum(ALF) is FREE and relies on donations from its members and guests to fund operational costs. If you visit this forum and find it helpful, please consider making a small donation.

Waiting for activation

Recent Activities

ALF running on new host :) by MrSydney
[Today at 10:35:46 AM]


Jewelers spectacle magnifiers by Prooz
[March 03, 2021, 09:06:47 AM]


Is a lab-created emerald a real emerald? by Pete49
[March 02, 2021, 01:01:40 PM]


Removing a silver bail glued to opal. by col
[March 02, 2021, 08:10:43 AM]


CLOSURE OF ALF by Gemster
[March 02, 2021, 01:03:56 AM]


Gems and Minerals on Postage Stamps by Ghost
[March 01, 2021, 05:14:54 PM]


Sieve Shakers by Ranger Itchy
[February 27, 2021, 05:39:32 AM]


mackay gold and crystals by miner917
[February 25, 2021, 08:40:58 AM]


Stabilising / filling with sodium silicate by Shifter55
[February 24, 2021, 08:50:15 PM]


Native Dog Ck in Essington SF near Oberon closed to fossicking by pc bowe
[February 22, 2021, 08:37:13 PM]


VJ Machine for sale by steve f
[February 16, 2021, 01:28:56 PM]


Discussion by harryopal
[February 16, 2021, 12:41:00 AM]


How much to charge for cutting stones by harryopal
[February 15, 2021, 09:12:07 PM]


Hessonite Garnet by Moth
[February 15, 2021, 12:08:00 PM]


PRiVATE PROPERTIRS FOR FOSSICKING NSW ? by MrSydney
[February 13, 2021, 10:49:19 AM]

* Calendar

March 2021
Sun Mon Tue Wed Thu Fri Sat
1 2 3 4 [5] 6
7 8 9 10 11 12 13
14 15 16 17 18 19 20
21 22 23 24 25 26 27
28 29 30 31

* Who's Online

  • Dot Guests: 129
  • Dot Hidden: 0
  • Dot Users: 1
  • Dot Users Online:

* Forum Stats

  • stats Total Members: 4501
  • stats Total Posts: 56809
  • stats Total Topics: 6071
  • stats Total Categories: 6
  • stats Total Boards: 27
  • stats Most Online: 773