2.Gemstone have many classes such as AA,AB.. Different class,different price.It's hard to define how much a gemstone value if you just mention gemstone.
3.Gemstone can be sorted by man-made stone and natural stone.
Another thing ,you shall notice that some sellers call cubic zirconia as diamond,actually,as we all know it's not ,just looks like diamond.
Hope it can help you !
Jewelry has one of the highest markups. Combine that with shoddy workmanship and poor quality or imitation stones and you have cheap.
Cheap products, cheaply made in developing countries and shipped straight to you when you buy on tv. They still make a huge profit.
Rubies, diamonds, and other jemstones have low-quality stones and high quality stones. Low quality stones can be very cheap.
So I always thought that all gemstones were hundreds or thousands of dollars but I'm watching rocks TV and some of these stones ate selling for like 30 or 40 dollars. What's the catch?