Hui Ka was one of the largest mines and it was also an old one. It had very few reserves at present which made the large boulder even rarer.
What was rarer was that not only did this boulder have many black spots, but there was also a distinct green python belt running through it.
There was a saying that went like this: 'Green comes with the black,' which meant that raw stones with black spots on them had a much higher chance of containing green jade.
As for the "python," the majority of them were formed from hard jade minerals that made up the jadeite. Hence, it often protruded and formed a multi-colored belt.
There were many different kinds of python belts and each kind represented the type of jade that might appear. But as long as there was a python belt, it meant there was indeed jadeite inside.
