Most Frequent Asked Questions about Diamonds
Q: Where do diamonds come from?
A: Mostly Central and South Africa as well as other parts of the world. For a detailed look see the map of the world hanging in our polishing area.
Q: What material is the disk to polish diamonds made of?
A: The disks are made of cast iron. To polish facets into the diamond, it is necessary to coat the disk with diamond dust and olive oil.
Q: What is a Conflict diamond?
A: A Conflict diamond is a stone extracted in an area of Africa controlled by military forces in rebellion against legitimate governments. The policy of Coster Diamonds is very clear. We abhor the role payed by Conflict diamonds and have a zero tolerance policy towards them.
Q: What is the largest diamond ever found?
A: The Cullinan Diamond found in South Africa (3106 ct). The replica of the diamond is displayed in the POLISHING AREA of our factory.
Q: How do I take care of my diamonds?
A: Place your diamond jewellery in hot water mixed with ammonia (3:1) and leave it for circa 20 minutes. Toothbrush soaked in alcohol will be enough to remove the soap, dust and dirt. For more information ask our sale staff to provide you with a booklet.
