Hai, I'm here to share my research data and hopefully can be use as references for anyone who read this thread
Please note that everything listed here may or may not be accurate due to many internal and external factor. Further research is needed.
These data doesn't include the use of Luminous Eye and Geiger Day drops such as Hazmat Set, etc.


I will be using x=item/y=total-geiger-usage to get the number of % for each item.
Item that comes in multiple quantity will be divided before going through the calculation process.




DATA PER APRIL 15th, 2020 to JUNE 15th, 2020
Amount of Geiger used: 1598
Discovery Rate: 94.44%(We couldn't find a single D Battery during the project )


List of Drops:
a. Colored Stuffs
Black: 294 = 6.13%
Blue: 375 = 7.82%
Green: 342 = 7.13%
Orange: 315 = 6.57%
Purple: 390 = 8.14%
Red: 363 = 7.57%
White: 411 = 8.57%
== 51.93% // ~7.42%
b. Crystals
Green: 54 = 3.38%
Blue: 41 = 2.57%
Red: 47 = 2.94%
White: 19 = 1.19%
Black: 2 = 0.13%
== 10.21% // ~2.04%
c. Miscellaneous
Radioactive Chemical: 350 == 21.90%
Nuclear Fuel: 111 == 6.95%
Star Fuel: 705 == 8.82%
d. Rares
Geiger Charger: 1 == 0.06%
Glowstick: 1 == 0.06%
D Battery: 0 == Unknown




SUMMARIZE
- We have around 51.93% chance of getting 3 of any colored stuff everytime we use a Geiger Counter
- We have around 10.21% chance of getting a crystal everytime we use a Geiger Counter
- We have around 21.90% chance of getting a Radioactive Chemical everytime we use a Geiger Counter
- We have around 6.95% chance of getting a Nuclear Fuel everytime we use a Geiger Counter
- We have around 8.82% chance of getting 5 Star Fuel everytime we use a Geiger Counter
- The rest of the reward have a very slim chance of getting(<1%)

These number will be updated next month, July 15th, 2020. Stay tune!