I use Ward's streak plates for my mineral identification lab. They are sturdy and can take abuse from 8th graders who are using them to identify minerals based on their physical properties such as streak color.
WARDSCI.com associatePublished 11/16/2018
Thanks for sharing!
Streak color helps identify minerals.
Plates Sized for Field and Lab Testing
Black Plates Work with Light Minerals
These unglazed porcelain plates are sized for field and lab testing. Rubbing the specimen across the plate reveals its streak color.
Black plates work with light minerals.
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