Howlite is a borate mineral. This stone may be known as an imitation gemstone because it can be painted with different colors and looks like semi-precious gemstones such as turquoise and coral. Howlite is often inexpensive, but it has many features that make it a popular gemstone in jewelry.
Aquamarine, named for the Latin phrase "water of the sea", is the blue to blue-green variety Beryl. Beryl also contains other gem varieties, including Emerald, and some lesser known varieties such as Morganite and Heliodor.
Citrine is a clear quartz, pale yellow and brownish orange, which is rare in nature. In the past, the color of its sobriety was confused with topaz. Citrine is the best-selling yellow to orange gemstone due to its attractive color, plus durability and affordability. Citrine can be an attractive option not only for topaz, but also for sapphire.