Over time your plated items will need to be re-plated. Contact your local jeweler for information on plating services.
On the Mohs Scale, which measures the hardness of minerals, simulated diamonds are an 8.0 to 8.5. Ruby, sapphire and diamond are all harder substances, but simulated stones are still very durable. It is important to understand that hardness is not necessarily related to durability. Even though diamond is the hardest mineral (10.0 on the Mohs Scale), it can still be chipped or broken.
The only ways to tell the difference between simulated diamonds and diamonds are by use of a thermal probe, by weighing the loose stone or by microscopic examination of surface features and inclusions. Simulated diamonds weigh approximately 65% more than diamonds. Therefore, while a 6.25 mm round diamond weighs about 1.00 carat, the same size simulated diamond weighs about 1.65 carats. If you know the weight of a simulated diamond, you can figure out the diamond weight equivalent by multiplying its weight by 0.6, or 60%.
Glossary
Brilliance: The white light leaving a jewel, traveling upward, which is visible to the eye. Brilliance is sometimes referred to as “sparkle.”
Dispersion: Flashes of rainbow colors. Also called “fire.”
Hardness: Resistance to scratching. The higher the number, the more resistant.
Luster: The shininess of a jewel.
Toughness: Resistance to breakage.
Earring Back Types
The backing is an important part of an earring, providing a secure closure and comfortable fit. Keep in mind, some earring styles work better with certain back types. Experiment with the different types to find the best fit for you!
Butterfly Back: A double looped piece resembling a butterfly that fits over a post. Variations on this design are called push back clasps. The basic post and butterfly back are usually used for stud earrings and lighter weight drop earrings.
Hinged Snap Backs: This clasp features a hinged post that snaps into a groove on the back of the earring. It is commonly found on hoops. Sometimes the hinged post is curved to provide more room to fit around the ear, sometimes called a saddleback.
Hook Backs: This earring backing is simply a long, bent post that fits through the piercing. Hooks have several variations, most notably the shepherd's hook and the French hook. While thin wire hooks reduce the weight of long earrings, making them more comfortable, they aren't as secure as other clasp styles.
Lever Back: A hinged lever snaps shut against the curved post to form a closed loop around the ear lobe. This clasp is very secure and good for large or medium sized styles that drop just below the ear.
Omega: Also called French clips, this clasp has a straight post and a looped lever. The hinged lever closes around the post and is held against the ear with pressure. The omega clasp is the most secure clasp, especially for the larger, heavier earrings.
Screw back: This backing is a slight variation of the standard post and butterfly nut back. Instead of pushing on the back, the nut twists onto the threaded post. A screw back post design is often preferred for expensive diamond stud earrings that require increased security.