Post subject: Re: Color Change Pyralspite heavy on Spessartine
Posted: Wed Jan 20, 2021 2:09 pm
Gold Member
Joined: Thu May 12, 2016 2:18 am Posts: 1542
Well all of these garnets are in the pyralspite mixture family. I see no reason that a color change stone couldn't have a mixture that is heavily weighted to the spessartine end member side.
What RI did you get on the stone? I suspect it would be on the lower end of the spessartine range +- 1.77, 1.78 area.
If so, even if Raman says Spessartine I would be tempted to use the pyrope - almandine - spessartine designation in the formal ID. The mix requirements to name something as an end member is fuzzy and depends on who you ask. Calling it a mix and you for sure won't be wrong.
The RAMAN database shows a match to a stone that was entered as a spessartine. But was that sample actually a pure end member stone?
Post subject: Re: Color Change Pyralspite heavy on Spessartine
Posted: Mon Jan 25, 2021 5:32 pm
Active Member
Joined: Wed Aug 09, 2017 8:33 pm Posts: 80
I am really into Color Change Gemstones!
This one is definitely a Pyrope-Spessartite Garnet. Their range between the two groups changes substantially amongst all color change stones. Check the graph here: https://www.gemstonemagnetism.com/color ... arnet.html
Users browsing this forum: No registered users and 18 guests
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot post attachments in this forum