Engagement season is year-round. Some hopeful future fiancés will be looking at certified diamond dealers and working with a jewelry designer to create a custom ring as a centerpiece of their proposal. Others may have discussed the engagement ring with their betrothed and may be investigating what, besides price, is the crystal and diamond difference. Many are just bewildered and wondering if the old three months salary rule for diamonds still holds true. Many will start their search with vintage jewelry shops and local jewelers without realizing they can search for the best quality diamonds online. By doing their research…