CLEAN : Sky Blue Diamond goes on sale in Geneva

The video discusses the significance and rarity of blue diamonds, highlighting the famous Blue Moon of Josephine and other notable stones. It explains that these gems are primarily sourced from the Cullinan mine in South Africa, emphasizing their rarity. The video also shares a historical anecdote about Catherine the Great, illustrating the historical value and intrigue surrounding such jewels.

What was the record-breaking value of the Blue Moon of Josephine per carat?

• $5 million

• $2 million

• $3 million

• $4 million

Which mine is known for producing the rare blue diamonds?

• Cullinan Mine

• Kimberley Mine

• Premier Mine

• Jwaneng Mine

What percentage of blue diamonds graded by the CIA are considered 'living blue'?

• 10%

• 5%

• 1%

• 15%

Who was Catherine, the first wife of Peter the Great, trying to secure a peace treaty with?

• The British Monarch

• The French King

• The Persian Emperor

• The Ottoman Sultan

What was the estimated value of Catherine's necklace?

• $9 to $11 million

• $1 to $2 million

• $3 to $5 million

• $6 to $8 million