Lab Test 13 - Istina's Box

[Juji]

~Request by Anhur~

Testing: Istina's Box (dont remember the right name)
Question: What is the probability of receiving items from that Box?
Reason: To determine how many Boxes you will need to open until you receive an item. And also to know what items u can get from them, i know some guys got Jewels and the majority like me get always Gemstones R.

Item Tested: Box containing M. Atk.
Number of Boxes Opened: 500
Items Received:
Gemstone R-Grade - 498
Unbind Scroll (R95-Grade) - 2

[Agent0range]

probability is one thing, but WHAT can you actually get? i heard the wildest things like BEWR/DEWR, soul bottles, unbind scrolls and the OP even mentioned jewels...