Видео с ютуба Understanding Carats

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4Cs of Diamond Quality: Diamond Carat Weight Grading by GIA

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Алмазная огранка — сравнение качества и цены — объяснение сердец и стрел

Things You Need to Know About Diamond Carat | Understanding Diamond Carat Weight | Carat Size Guide

How to Value a Diamond (Step by Step Process)

Carat Weight v. Carat Total Weight Explained

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10k vs 14k vs 18k & 24k - Gold Karat Compared and Explained