Silver/diamond 'square' cross earrings- Hot Diamonds?

I have a pendant which I think is 'Hot Diamonds' but not sure. I have lost the matching earrings and would love to replace them. They are exactly the same as the pendant- what I can only describe as a square cross in sterling silver with a single genuine diamond. I have pictured the pendant to help identify the earrings-sorry if it's not very good as the diamond reflects the light. These items are not available now in shops as I have had mine a number of years.