We have run out of stock for this item.
Bright green fluorescent opal from Mexico. Clear, glassy bubble shine bright under UV. Trace amounts of uranyl are the reason for this bright green glow.
Select the piece you want to buy by choosing the number. You'll get the exact crystal shown in the photos.
1: 1 1/2", 17 grams
2: 1 1/4", 10 grams
3: 1 1/4", 6 grams
4: 1", 4 grams
5: 3/4", 4 grams
6: 1/2", 1 grams
7: 1 3/4", 19 grams
8: 1 1/4", 11 grams
9: 1 1/4", 8 grams
10: 3/4", 4 grams
11: 3/4", 3 grams
12: 1/2", 1 grams
13: 1 1/2", 16 grams
14: 1 1/2", 13 grams
15: 1 1/2", 11 grams [sold out]
16: 1", 3 grams
17: 1 3/4", 3 grams
18: 3/4", 2 grams
Photos taken using our GloBox 365nm UV light housing. These crystals will show best using a 365nm/255nm FILTERED UV flashlight.
They were nicknamed "Yooperlites" which is derived from the name “yooper”. A yooper is a nickname for the Upper Peninsula natives and these fluorescent stones quickly gained fame. After data was published on these fluorescent stones, it was discovered that sodalite is the actual true mineral that is fluorescing orange.
365nm UV light is often called "blacklight". Before the advent of longwave UV LEDs, blacklight fluorescent tubes, (the kinds used in hippie days to light up psychedelic posters) were the standard longwave UV light for our hobby. They were not very powerful but they did light a large area.
Enter 365nm UV LEDs
First, an animation showing the difference between the UV flashlight we recommend (365nm filtered UV flashlight) versus unfiltered 395nm UV flashlights we see many folks carrying around at shows. So. much. visible purple light. We selected a bunch of rocks as a demonstration. Took pictures of them under his flashlight without the filter and then with the filter.
