There are many people and great strength, and soon dozens of rocks of all sizes were chiseled out, and then everyone's luck was not as good as Zhang Nan just now: after turning over and over and looking at all the large and small stones, Xie Jianliang found a small diamond of up to twenty or thirty times in size on the surface of one of the stones the size of a human head. Pen @ fun @ pavilion wWw. ｂｉｑUｇE。 ｉｎｆｏ

With a group of laymen with a slightly disappointed expression, the three experts were all a little ecstatic when they found the second diamond.

"It's definitely a bonanza, absolutely!"

The discovery of a diamond may be a special case of thousands of species, and the field where Changlin diamonds were found in Huaxia has not heard of a second diamond coming out, but once the second case appears, it is 100%!

Carrying all the stones dug up after the explosion to the camp, Zhang Nan took advantage of this effort to pry off the diamond the size of a soybean.

The electronic scale weighs more than 2.5 carats.

"Zhang Sheng, how big of a finished diamond can this process?"

Xiang Zhangsheng took it, studied it with a magnifying glass for a while, and said, "I'm not an expert on this, but this one is in good shape at the original shape, and there are no inclusions and cracks on the inside and surface, and it should be able to retain 6 to 7 percent of its weight." ”

Return it to Zhang Nan, "1.5 carats should be fine." ”

Nicole on the side said, "What, you want to keep it for yourself?"

"This is the first diamond we found, and the first diamond found in each pit in the future is processed into jewelry."

Regardless of its size, it will be the best witness to our diamond empire in the future. ”

Nicole answered, "It's just a little smaller." ”

Hearing this, Zhang Nan said helplessly: "My dear, this is a carat diamond!"

"Only more than 5 carats count. ”

Speechless!

Self-inflicted, now these two American women of their own have obviously lost love for finished diamonds under 5 carats.

......

The crusher is ready, the diesel generator engine comes.

Because the stone crusher brought this time is a super miniature thing, and the stones to be stuffed into it can't be too big, the guys took out hammers and chisels and carefully smashed the stones open.

Alyosha jumped in that burst, and he found one!

A group of people were there asking, "How old?!"

Smashing diamonds, it's still a bonanza, it's really a bit of a taste of smashing golden eggs to open a jackpot, and it's a lot of fun!

And apart from his own gang, there is not even a birdman in millions of square kilometers here, and Guan Xingquan and Paul are still searching for any possible carnivores on the west side of the island, and the bodyguards have not been so relaxed for some time.

Play.

Xiang Zhangsheng saw Xie Jianliang take out a bucket of diiodomethane from the tent where the supplies were stacked, so he stepped forward, "Old Xie, do you want to use this?"

Xie Jianliang's expression was a little serious, and when he heard Xiang Zhangsheng's words, he said: "Xiang Gong, Lao Tang and I feel that it is best not to use this thing, it is too toxic, what do you think?"

"I also feel like it's better not to use it, it's a big deal that we spend more time. ”

The three of them summed up and talked to Zhang Nan, hoping that the boss would agree with their ideas.

This thing is used for mineral processing, in order to speed up, but this can easily cause pollution when operated under poor conditions.

The process of diamond ore dressing is complex, but in simple terms, the kimberlite is crushed and then the heavy mineral diamond is separated from the light mineral waste rock with a specific gravity solution.

The third step is to use an X-ray blower to automatically sort the diamond from other heavy minerals by using the principle that the diamond fluoresces under X-ray.

Finally, the heavy minerals sorted by the X-ray blower pass through a special grease band, and the diamonds that have previously missed the net will be stuck by the grease because of the special lipophilicity of the diamonds.

Mechanized mining sites generally follow this beneficiation procedure, both primary and secondary ores.

The specific gravity of diiodomethane is 3.32, and the specific gravity of natural diamonds is 3.52.

However, diiodomethane is not small in toxicity, and the impact on the environment and the human body is very harmful, and it is best to wear a gas mask, not to mention rubber gloves. Therefore, although the three experts brought this most convenient diamond specific gravity solution this time, they would be in a completely unpolluted natural environment, so they were reluctant to start.

So what to do?

Speaking to the boss, Zhang Nan certainly didn't want to use poisonous things.

"What then?"

"Use the gold panning method. ”

"Then do it!"

All the ore is weighed first, a total of 118 kilograms, and when the final number of diamonds comes out, you can know the amount of rough diamonds near this location.

In this way, select a few more points and drill a few holes with a drill rig, which can measure the taste of the ore in this rock tube.

Start the stone crusher, connect the iron bucket at the exit, and the fist-sized stones are all in and come out as gravel.

There is no wood to make the screening shelf, fortunately there are many people and less ore, take out all the stainless steel basins and iron buckets, wash!

There is water next to the camp, and three experts will demonstrate to everyone.

Put two large handfuls of gravel into a bucket, shake it a few times, and pour out most of the water before dumping it into a stainless steel basin.

Add water and shake it to stratify the ore: just like panning for gold, diamonds with a larger gravity will sink down, and anyone who is not blind will be able to see the difference between useless waste rock and diamonds.

Remove the waste rock that can be easily extracted at the beginning, and then dig again, two or three times through the water, and the remaining animals are relatively fine gravel.

Tang Jichao and Xie Jianliang's craftsmanship is more proficient than Xiang Zhangsheng's, and they are worthy of being from the geological army, and they are all good at panning for gold.

The fastest is Tang Jichao, after throwing away two batches of waste stones in a row, only the last layer of stones is left at the bottom of the basin in his hand.

Holding the basin on the ground, a small stone was detected inside, but it reflected the charming luster in the sun.

"Diamonds, about 0.5 carats. ”

Spread out in the palm of the hand, this is a typical crystalline hair diamond, with a little yellowish color.

"Is the color bad?"

Zhang Nan asked.

Tang Jichao looked at it with a magnifying glass and said, "I or J, valuable, absolutely gem-quality, it should be very good after polishing, and I basically didn't find any flaws in it." ”

With that, put the little diamond in a small sealed plastic bag that had been prepared long ago.

Tang Jichao picked out two gray-brown stones from the basin, one large and one small, and then poured out the gravel particles in the basin: the big one was the size of two soybeans, four or five carats, and the small one was about 0.5 carats.

"These two are also diamonds, but the color looks terrible now, and it is likely that they are only industrial grade, and I will look at them later with the instrument. ”

Industrial-grade diamonds, absolutely no one likes gray-brown diamonds, and these diamonds usually have a lot of inclusions inside, and can only be used for industrial purposes in the end.

If a diamond mine accounts for 2 percent of the gem-grade rough diamonds, then they are at least 5 times more valuable than 8 percent of industrial grade diamonds!

Tang Jichao chose a catty of gravel at most, and found three diamonds in it, which is definitely good news, Zhang Nan couldn't help but take a basin and start drying.