跟讀練習: Why Diamond Prices Are Falling So Fast - 通過影片學習英語口語

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The price of natural diamonds has plunged roughly 60 % in five years,

falling from an all -time high of about $10 ,000 for a one -carat diamond in March 2022.

The main culprit?

A boom in lab -grown alternatives.

Entering the market at a fraction of the cost, man -made diamonds have surged in popularity over the last few years.

While buyers save thousands of dollars, the shift is changing the fabric of the traditional diamond market and raising questions about the future of the centuries -old industry.

Lab -grown diamonds are created by placing small diamond seeds into a vacuum chamber with carbon -rich gases.

Under controlled heat and pressure, the seed grows layer by layer before being cut and polished.

They look just like natural diamonds and have the same chemical and physical properties, but because they can be produced in unlimited quantities,

lab -grown stones sell for far less than natural diamonds.

This price difference has driven an enormous shift in consumer habits.

In 2026, lab -grown stones, including diamonds, accounted for 61 % of all U .S engagement ring sales.

That's a 239 % increase since 2020.

A diamond, it's a carbon, precious stone, scarcity, it's a rare stone.

Now, this is a product that is produced in a factory.

There's unlimited supply.

Retailers have noticed.

Pandora, a Danish retail jeweler with stores in more than 100 countries, completely stopped using mine diamonds in 2021,

pivoting exclusively to 100 % lab -grown stones.

We see today, we understand that around 60 or 70 percent of engagement rings are synthetic diamonds, not natural diamonds.

Beyond the price tag, lab -grown diamonds have other benefits, too.

A one -carat lab -grown diamond has a carbon footprint 90 percent lower than a mined diamond of the same size.

Natural diamonds also carry a complicated history.

Conflict diamonds mined in war zones once represented about 4 percent of global production.

The Kimberley process came into force in 2003, an attempt to stop the trade, but there is a catch.

Lab -grown diamonds might not have the same resale value as a natural diamond does.

You shouldn't be buying a diamond thinking that there's a financial investment to it.

And all they write back every single time is that you get no value back on your lab -grown diamond, right?

All right, well, guess what?

You know, surprise, you don't get any value back on your natural either.

To understand how deep this crisis goes, you have to look at where diamonds come from.

As of 2025, more than 85 % of global diamond mining happens in just five countries.

Russia, Botswana, Angola, Canada, and the Democratic Republic of Congo.

Between geopolitical uncertainty, excess inventory of polished diamonds, and higher tariffs on diamond imports from India, the biggest players in the industry are being forced to pivot.

De Beers Group, a subsidiary of Anglo -American, announced it would pause production at its flagship Phoenicia mine in South Africa for over two years to cut costs

and streamline operations.

The diamond company also briefly opened and shut down its very own lab -grown diamond brand.

Lightbox was launched in 2018 with the plan to price its stones at $800 per carat.

The business closed seven years later after lab -grown diamond prices fell 90 % at the wholesale level.

And De Beers isn't alone.

Russia's state -owned Alrosa, which counts for about 30 % of global diamond production, reported a decline in production between 2023 and 2025.

So where does that leave the market?

Have natural diamond prices finally hit rock bottom?

According to Mano, Rappaport's diamond research shows signs of stabilization.

I believe and our organization believes that we are around rock bottom and things are starting to shift.

I think the pricing is extremely fair right now.

The big thing that consumers see is kids walking around with five carat diamonds right

and now they're able to do so you know

and able to afford it and then you know able to take the extra money

that they didn't spend on the five carrot natural and, you know, put it towards their wedding and buy a house.

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本課的詞彙與口語要點

這節 B2 級別的口語課以影片“Why Diamond Prices Are Falling So Fast”為素材。影片中反覆出現的詞有：diamond, lab, grown, natural, stone。這段影片共有 50 個句子、667 個單詞可供跟讀。講話部分時長為 4:15。說話人語速自然，每分鐘約 157 個詞，接近日常對話。只有 76% 的單詞屬於英語最常用的 3,000 詞，詞彙難度較高。

影片中的重點詞彙

影片中最難的 15 個單詞，附發音和釋義：

單詞	發音	釋義
carat 名詞	/ˈkæ.ɹət/	克拉
pivot 名詞	/ˈpɪv.ɪt/	樞 /樞, 樞紐 /樞紐
unlimited 形容詞	/ʌnˈlɪm.ɪ.tɪd/	無限 /無限
culprit 名詞	/ˈkʌlpɹɪt/	元兇, 肇事者
geopolitical 形容詞		地緣政治學的 /地緣政治學的
jeweler 名詞	/ˈd͡ʒuːələ(ɹ)/	珠寶商 /珠寶商
pandora 名詞		緋小鯛 /緋小鯛
resale 名詞	/ˈriˌseɪl/	轉賣 /轉賣, 轉售 /轉售
scarcity 名詞	/ˈskɛɹsɪti/	缺少
stabilization 名詞	/ˌsteɪ.bəl.ɪzˈeɪ.ʃən/	穩定化 /穩定化, 安定化
streamline 動詞	/ˈstriːmlaɪn/	精簡 /精簡, 簡化 /簡化
tariff 名詞	/ˈtæɹəf/	關稅 /關稅
footprint 名詞	/ˈfʊtpɹɪnt/	腳印 /腳印, 足印
carrot 名詞	/ˈkæɹət/	хуонлуәбу, 紅菜頭 /紅菜頭
retailer 名詞	/ˈɹiteɪlɚ/	零售商

影片中的語法

說話人最常用的結構，並附上影片中的原話：

結構	影片中的用法
被動語態 be + 過去分詞 — 強調發生了什麼，而不是誰做的	are created · being cut · can be produced
現在完成時 have/has + 過去分詞 — 過去發生但與現在仍有關聯的事	has plunged · have surged · has driven

需要注意的發音

說話人用了 5 次縮略和弱讀形式，例如 didn't, don't, isn't。請按聽到的簡短形式來說。

“sh” 和 “zh” 音: stabilization /ˌsteɪ.bəl.ɪzˈeɪ.ʃən/, flagship /ˈflæɡʃɪp/, fraction /ˈfɹæk.ʃən/
長單詞——注意重音位置: unlimited /ʌnˈlɪm.ɪ.tɪd/, stabilization /ˌsteɪ.bəl.ɪzˈeɪ.ʃən/, subsidiary /sʌbˈsɪ.di.əɹ.i/, uncertainty /ʌnˈsɜːtənti/

如何用這段影片練習

先完整聽一遍影片，不要開口，記下不認識的單詞。
先用 0.75 倍速逐句跟讀，熟練之後再回到正常速度。
錄下自己的聲音並與原聲對比，特別注意 carat, pivot, unlimited 這類單詞。

什麼是跟讀法？

跟讀法 (Shadowing) 是一種有科學依據的語言學習技巧，最初開發用於專業口譯員的培訓，並由多語言者Alexander Arguelles博士普及。這個方法簡單而強大：您在聽英語母語原聲的同時立即大聲重複——就像是一個延遲1-2秒緊跟說話者的影子。與被動聽力或語法練習不同，跟讀法強迫您的大腦和口腔肌肉同時處理並模模擬實的講話模式。研究表明它能顯著提高發音準確性，語調，節奏，連讀，聽力理解和口語流利度——使其成為雅思口語備考和真實英語交流最有效的方法之一。

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跟讀練習: Why Diamond Prices Are Falling So Fast - 通過影片學習英語口語

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