I called directory assistance in Dallas TX 972-386-4644 is the correct number for Westar Oil.
She said that there was no International Diamond at that address. When you google International Diamond and Gold you get different numbers - none at that address.
I think this is a new number for Westar Oil and was assigned previously to other companies, and we are getting old info on google.
Also if it is the current number for a jewelry store some one would answer the phone.
I just now called and got the same message saying leave a message, and no company is mentioned.