August 3-4—SAN FRANCISCO, CALIFORNIA; Annual show; San Francisco Gem & Mineral Society; San Francisco County Fair Building, Golden Gate Park, 9th Avenue & Lincoln Way; Sat. 10-6, Sun. 10-5
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 Post subject: Some kind of jade?
PostPosted: Thu Jan 10, 2019 1:50 am 
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Joined: Wed Jan 09, 2019 8:00 pm
Posts: 1
Hi! My grandmother found this in the yard when she moved into her house many years ago, and my aunt has it now. I am by no means a serious collector, but I love looking at pretty mineral collections but I've never come across anything like it. We were wondering what it is and if it is valuable. All the information I have is that it will scratch a kitchen knife.

Goldfish cracker for scale :)

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N197Tg-hiFZKs9JRcBYKoNlSSoYvbBoRbjcVq9ykR5zb8mAolm6WeNafICxvOVFlBsPczQbex3vAYtuUM5gXow8eLBZYHPDXDpJvUGY5gDv3ajUckMj4R6ERLQ3yUVZUaU-0dxwxOfOsbqc4UH0wUrs3HX5Cj6p5DHMcaSCP9uO4yY76f-kCjvZQgno3hZyu8RgyLpe7fOSSUmu3xmH7X-oAyCjx.jpg [ 55.79 KiB | Viewed 272 times ]
KaTyd67VSpK3qAuF19SJ9X5ub7H9PbB9QN9zXpjWCmVmEABNREznbkPnSAF5jzvvuAnWBTaDh7EEoMx8_qNHOFGufo32m9QzzP2VBiB5AdiltUgeyMp1u4R2YfTOMu78vf6LziYZ5dZrchUCRtyHsxB_8vv5sva6-vuHx5pF9cD6xF2VgDgAupH81P9XURHMRHzNpGTy9eGNc2628B6LPjLEsVZQ.jpg [ 44.13 KiB | Viewed 272 times ]
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 Post subject: Re: Some kind of jade?
PostPosted: Thu Jan 10, 2019 12:14 pm 
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Joined: Sun Sep 04, 2016 8:07 am
Posts: 123
Unlikely to be jade as it appears to have a conchoidal fracture, probably slag glass.
Will it scratch hardened steel like a file?

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