Diamond-encrusted swords and intricately designed brooches may be broken up by thieves, experts say.
Read moreDiamonds
The moments thieves break into a German museum and steal diamonds worth up to a billion euro.
Security video shows thieves smashing their way into Dresden's world-famous Green Vault collection.
Read moreDan Whitworth and Simon Maybin
File on 4
Cynthia Tuck says fraudsters took her life savings and that no-one has faced justice for what happened.
Read moreZimbabwe anger over US diamond ban

Zimbabwe's government has condemned the US' decision to ban its diamonds from entering the country on the grounds that they had been produced through forced labour.
The US's claim was a "shameless lie", and amounted to new sanctions against Zimbabwe's dfiamond industry, Information Minister Nick Mangwana was quoted by the state-owned Herald newspaper as saying.
The US embassy tweeted on Tuesday that the US Customs and Border Protection agency had issued a "Withhold Release Order" for artisanal rough cut diamonds from Zimbabwe’s Marange fields due to evidence of forced labour.
Zimbabwe is in deep financial crisis, and the ban comes at a time when President Emmerson Mnangagwa is trying to improve relations with Western powers in a bid to boost the economy.
The industry's global watchdog body, the Kimberley Process, lifted a ban on Zimbabwean diamond sales in 2011, with the backing of the US and European Union.
The ban was imposed in 2009 following reports that Zimbabwean military officials were benefiting from the diamond trade and there had been killings and human rights abuses at the Marange fields.
The discovery may help us learn more about the Earth's internal structure and how it was formed.
Read morePadraig Belton
Business reporter
How can we be sure the diamonds we buy are not fake or from conflict regions?
Read moreA diamond dealer is banned from running businesses after being found to have falsified paperwork.
Read moreDe Beers is investing to communities in Botswana as part of a diamond joint venture with its government.
We visit the online diamond store that does a roaring trade in the run-up to Christmas.





