A large and very rare pink diamond has been found in the African country of Angola. The pink diamond weighs 170 carats. A carat is a weight measurement used only with some valuable minerals. It is equal to 200 milligrams. The diamond is said to be one of the largest gems(宝石) found in 300 years.

The gem even has a name. It is called “Lulo Rose”. The mine owner, Lucapa Diamond Company, said on their website that it was found in the Lulo alluvial diamond mine. Alluvial mines are near or in riverbeds.

The chief of Lucapa, Stephan Wetherall, said, “Only one in 10,000 diamonds is colored pink. So, you’re certainly looking at a very  ▲  article when you find a very large pink diamond.” Wetherall also said that he does not know how much someone will pay for this diamond because of its color, but the value is expected to be very high.

The Lucapa company searches for underground rock formations called “kimberlite pipes”. This is known to be a main source of diamonds, said Wetherall. He said, “We’re looking for the kimberlite pipes that brought these diamonds to the surface. When you find these high-value large diamonds ... it certainly elevates the excitement from our perspective(态度) in our hunt for the primary source.”

The Lulo mine, which employs around 400 people, has already found two of the largest diamonds ever found in Angola. Angolan mines are one of the world’s top 10 producers of diamonds. The company Sodiam, an Angolan state diamond marketer, will sell the pink diamond by international tender(投标).

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1.The newly-found diamond is named Lulo Rose after_____.

A the finder

B the mine owner

C the mining place

D Lucapa Diamond Company

解析：选C。C 细节理解题。根据第二段的“The mine owner, Lucapa Diamond Company, said on their website that it was found in the Lulo alluvial diamond mine.”可知，该粉钻是在卢洛冲积钻石矿发现的。所以，它是以采矿地点命名的，故选C。

2.Which of the following is probably the missing word in ▲ ?

A rare

B surprising

C attractive

D amazing

解析：选A。A 推理判断题。根据上文“Only one in 10,000 diamonds is colored pink.”可知，每一万颗钻石中只有一颗是粉红色的。由此说明该粉钻是非常罕见的，故选A。

3.According to Paragraph 4, we know that_____.

A kimberlite pipes give a helping hand to miners

B large diamonds are of high value in the markets

C the Lucapa company is trying to find more purple diamonds

D large diamonds can motivate the miners’ working passion

解析：选D。D 推理判断题。根据第四段的“it certainly elevates the excitement from our perspective in our hunt for the primary source.”可知，从我们寻找主要来源的态度来看，这无疑提升了卢卡帕公司方的兴奋感。由此说明大型钻石可以激发矿工的工作热情，故选D。

4.How will the pink diamond be dealt with later on?

A It will go to the local museum.

B It will be traded on the market.

C It will be displayed at the Lulo mine.

D It will be preserved by the company Sodiam.

解析：选B。B细节理解题。根据最后一段的“The company Sodiam, an Angolan state diamond marketer, will sell the pink diamond by international tender.”可知，安哥拉国有钻石销售商索迪亚姆公司将通过国际招标出售这颗粉红色钻石。故选B。