Hand engraving allows for more flexibility and custom designs since it's done entirely free-hand. The hand-held engraving tools go deeper into the metal so the engraving lasts longer and is visually sharper.
Machine engraving consists of an engraver following a template to form the letters of a design. It's less costly, but there is less depth and it isn't as striking as a hand engraved piece.
Whether you're having ring personally engraved or you've noticed a particular motif you like on a piece of existing jewelry, it's important to discuss with your sales associate what will work best for the look you are trying to achieve.
Gold is naturally yellow; it's the mix of alloys in the casting of the metal that can make it appear white. However, even white gold can still have a yellow cast to it until it's rhodium plated to give it a bright white look. But over time, the rhodium will wear away and the piece will need to be re-plated.
Platinum is a more durable metal, and its strength is ideal for securing and setting diamonds. It's denser than white gold and lasts for many years before it starts to show wear. Platinum is also more resistant to corrosive materials (often found in household cleaners) that may pit or oxidize gold. Platinum is a pure metal so it doesn't tarnish or lose its rich white luster that showcases diamonds beautifully.