Nobody likes tension, but when it comes to jewellery, it is sometimes a necessary requirement. When Vancouver designer Andrew Costen decided he would make a claspless bracelet set with gemstones along a platinum wire, he knew creating the right amount of tension would be the biggest challenge. Too much of it and the wire would not be flexible enough to allow the bracelet to be put on. Too little tension and it would not spring back properly and fit tight on the wrist.