Therefore, I suppose that on an enterprise so important as the theft of a valuable diamond, two would work together.

I need hardly state that this is utterly useless, for no diamonds, commercially valuable, can be made by men.

He then takes his father's most valuable diamonds.

The kidnappers believe the number will lead them to a valuable red diamond.

Cutting such an immense and valuable diamond required expertise and a considerable investment.

He is left with his highly valuable diamond.

It may be mentioned here that many valuable diamonds are now set in platinum instead of gold.

I understand that your father had some valuable diamonds in his possession.

He went on: "Did you know that your father-in-law kept a quantity of valuable diamonds in his safe?"

Maybe it was just another fabulously large, immensely valuable diamond.