Pratique du Shadowing: Why Diamond Prices Are Falling So Fast - Apprendre l'anglais à l'oral avec la vidéo
Création de la leçon...
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The price of natural diamonds has plunged roughly 60 % in five years,
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falling from an all -time high of about $10 ,000 for a one -carat diamond in March 2022.
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The main culprit?
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A boom in lab -grown alternatives.
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Entering the market at a fraction of the cost, man -made diamonds have surged in popularity over the last few years.
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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.
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Lab -grown diamonds are created by placing small diamond seeds into a vacuum chamber with carbon -rich gases.
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Under controlled heat and pressure, the seed grows layer by layer before being cut and polished.
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They look just like natural diamonds and have the same chemical and physical properties, but because they can be produced in unlimited quantities,
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lab -grown stones sell for far less than natural diamonds.
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This price difference has driven an enormous shift in consumer habits.
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In 2026, lab -grown stones, including diamonds, accounted for 61 % of all U .S engagement ring sales.
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That's a 239 % increase since 2020.
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A diamond, it's a carbon, precious stone, scarcity, it's a rare stone.
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Now, this is a product that is produced in a factory.
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There's unlimited supply.
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Retailers have noticed.
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Pandora, a Danish retail jeweler with stores in more than 100 countries, completely stopped using mine diamonds in 2021,
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pivoting exclusively to 100 % lab -grown stones.
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We see today, we understand that around 60 or 70 percent of engagement rings are synthetic diamonds, not natural diamonds.
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Beyond the price tag, lab -grown diamonds have other benefits, too.
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A one -carat lab -grown diamond has a carbon footprint 90 percent lower than a mined diamond of the same size.
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Natural diamonds also carry a complicated history.
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Conflict diamonds mined in war zones once represented about 4 percent of global production.
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The Kimberley process came into force in 2003, an attempt to stop the trade, but there is a catch.
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Lab -grown diamonds might not have the same resale value as a natural diamond does.
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You shouldn't be buying a diamond thinking that there's a financial investment to it.
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And all they write back every single time is that you get no value back on your lab -grown diamond, right?
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All right, well, guess what?
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You know, surprise, you don't get any value back on your natural either.
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To understand how deep this crisis goes, you have to look at where diamonds come from.
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As of 2025, more than 85 % of global diamond mining happens in just five countries.
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Russia, Botswana, Angola, Canada, and the Democratic Republic of Congo.
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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.
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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
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and streamline operations.
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The diamond company also briefly opened and shut down its very own lab -grown diamond brand.
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Lightbox was launched in 2018 with the plan to price its stones at $800 per carat.
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The business closed seven years later after lab -grown diamond prices fell 90 % at the wholesale level.
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And De Beers isn't alone.
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Russia's state -owned Alrosa, which counts for about 30 % of global diamond production, reported a decline in production between 2023 and 2025.
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So where does that leave the market?
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Have natural diamond prices finally hit rock bottom?
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According to Mano, Rappaport's diamond research shows signs of stabilization.
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I believe and our organization believes that we are around rock bottom and things are starting to shift.
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I think the pricing is extremely fair right now.
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The big thing that consumers see is kids walking around with five carat diamonds right
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and now they're able to do so you know
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and able to afford it and then you know able to take the extra money
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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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Vocabulaire et conseils d’expression pour cette leçon
Cette leçon d’expression orale de niveau B2 s’appuie sur la vidéo « Why Diamond Prices Are Falling So Fast ». Les mots qui reviennent le plus souvent : diamond, lab, grown, natural, stone. Cette vidéo contient 50 phrases et 667 mots à répéter en shadowing. La partie parlée dure 4:15. Le locuteur parle à un rythme naturel d’environ 157 mots par minute, proche d’une conversation courante. Seuls 76 % des mots font partie des 3 000 mots les plus courants en anglais, le vocabulaire est donc exigeant.
Vocabulaire clé de cette vidéo
Les 15 mots les plus avancés de la vidéo, avec leur prononciation et leur sens :
| Mot | Prononciation | Sens |
|---|---|---|
| carat nom | /ˈkæ.ɹət/ | carat |
| pivot nom | /ˈpɪv.ɪt/ | pivot |
| unlimited adjectif | /ʌnˈlɪm.ɪ.tɪd/ | illimité |
| culprit nom | /ˈkʌlpɹɪt/ | coupable |
| jeweler nom | /ˈd͡ʒuːələ(ɹ)/ | joaillier, joaillière |
| plunge verbe | /plʌnd͡ʒ/ | plonger |
| resale nom | /ˈriˌseɪl/ | revente |
| scarcity nom | /ˈskɛɹsɪti/ | manque, rareté |
| stabilization nom | /ˌsteɪ.bəl.ɪzˈeɪ.ʃən/ | stabilisation |
| streamline verbe | /ˈstriːmlaɪn/ | fuseler |
| tariff nom | /ˈtæɹəf/ | droit de douane |
| footprint nom | /ˈfʊtpɹɪnt/ | empreinte de pied |
| carrot nom | /ˈkæɹət/ | carotte |
| retailer nom | /ˈɹiteɪlɚ/ | revendeur, distributeur |
| flagship nom | /ˈflæɡʃɪp/ | navire amiral, bateau amiral |
Les verbes à particule que vous entendrez
| Mot | Sens |
|---|---|
| shut down verbe | éteindre |
La grammaire de cette vidéo
Les structures que le locuteur utilise le plus, avec les mots exacts de la vidéo :
| Structure | Dans la vidéo |
|---|---|
| Voix passive be + participe passé — l’accent est mis sur ce qui arrive, pas sur qui le fait | are created · being cut · can be produced |
| Present perfect have/has + participe passé — une action passée qui compte encore maintenant | has plunged · have surged · has driven |
Prononciation à surveiller
Le locuteur utilise 5 contractions et formes réduites, comme didn't, don't, isn't. Prononcez-les sous leur forme courte, telles que vous les entendez.
- Les sons « sh » et « zh »: stabilization /ˌsteɪ.bəl.ɪzˈeɪ.ʃən/, flagship /ˈflæɡʃɪp/, fraction /ˈfɹæk.ʃən/
- Mots longs — placez bien l’accent: unlimited /ʌnˈlɪm.ɪ.tɪd/, stabilization /ˌsteɪ.bəl.ɪzˈeɪ.ʃən/, subsidiary /sʌbˈsɪ.di.əɹ.i/, uncertainty /ʌnˈsɜːtənti/
Comment s’entraîner avec cette vidéo
- Écoutez la vidéo en entier une fois sans parler et notez les mots que vous ne connaissez pas.
- Commencez à la vitesse 0,75×, répétez phrase par phrase, puis revenez à la vitesse normale quand cela devient facile.
- Enregistrez-vous et comparez avec l’original, en faisant attention à des mots comme carat, pivot, unlimited.
Qu'est-ce que la technique du Shadowing ?
Le Shadowing est une technique d'apprentissage des langues fondée sur la science, développée à l'origine pour la formation des interprètes professionnels. Le principe est simple mais puissant : vous écoutez de l'anglais natif et le répétez immédiatement à voix haute — comme une ombre suivant le locuteur avec un décalage de 1 à 2 secondes. Les recherches montrent une amélioration significative de la précision de la prononciation, de l'intonation, du rythme, des liaisons, de la compréhension orale et de la fluidité.