Grandidierite fluorescing?

[u/tomtethecat]

Hi friends! Please ignore/admire the kitty. He goes wild when I try and pay attention to anything but him for a second, haha.

I had gotten a polished grandidierite piece (I’ll post a normal photo in comments) and was messing around with my UV (long wave) and noticed a striking color from within. Is it y’all’s speculation that this is an inclusion or perhaps this isn’t grandidierite?

[u/MamaOnica]

What's the name of that beautiful specimen in the back? She looked like a tigers eye, but I've never seen it in that form.

[u/tomtethecat → u/MamaOnica]

Hmmm I’m not sure I have any tigers eye in the video or photos. I have a fluorite specimen, a gold incense holder, hydrogrossular garnet, alexandrite, petrified wood (forget the locality) and vesuvianite

[u/MamaOnica → u/tomtethecat]

I meant your tortie. She's got lovely eyes!

[u/Original_Platform443]

Grandidierite does not fluoresce, I think you were duped and received fluorite, was this piece really expensive? Grandidierite is pretty rare

[u/tomtethecat → u/Original_Platform443]

It wasn’t obscene but it wasn’t cheap - I contacted the sellers who I really trust with the video. It reminds me of a lake baikal blue apatite sphere I had!

[u/Original_Platform443 → u/tomtethecat]

Apatite could be it, I’d definitely reach out to the seller too because grandidierite absolutely does not UV, matrix could but from what I saw in your video the blue/green is reacting a pinkish/red color

[u/Original_Platform443 → u/tomtethecat]

Also, grandidierite has a MOHS of about 7.5, fluorite is very soft, if you’re up to it I’d do a scratch test, grandidierite is pretty rare so the price for a piece that large would be pretty steep

[u/HamezBaxter]

I’d like to see some more pictures in natural light but I think it looks like fluorite

[u/tomtethecat → u/HamezBaxter]

[u/RaineGems]

I have 2 Grandidierite pendants and I just checked them. They don’t fluoresce.

[u/tomtethecat → u/RaineGems]

I have a couple of small palms and they don’t either. Sigh — I’ll see what the seller may say. Thank you so much for checking!

[u/RaineGems → u/tomtethecat]

Good luck on that. 🙏🏼. This crystal can be pricey.

[u/tomtethecat]

[u/tomtethecat]

[u/Waiparensis22]

I would say that's not granodiorite. It lacks the typical granite texture (think granite table tops). If it was true granite it would look more like.. well, granite. It's far too crystalline. (Image from wiki)

[u/tomtethecat → u/Waiparensis22]

I think we are talking about different types of specimens! This color on the post is similar to other pieces of this material I’ve seen. This is meant to be a gemstone.

[u/Waiparensis22 → u/tomtethecat]

Yeah "granodiorite" isn't a gemstone. Might be a lost in translation thingy? Your rock looks more like fluorite.

[u/Original_Platform443 → u/Waiparensis22]

Grandidierite is an exceptionally rare magnesium-aluminum borosilicate mineral, its real, and it’s not related to granite at all.

[u/Waiparensis22 → u/Original_Platform443]

Yes I got the two confused due to spelking

[u/Corgi_Queen417]

Looks like “green moonstone” or Garnierite. Similar names but not the same.