Category: Market Trends

Cobalt Spinel

Spinel is a magnesium-aluminum silicate that forms in the cubic system. While most gemologists are only aware of gem quality, transparent spinels, it is, in fact, a solid solution series with many different species that…

Cultured Pearl Market Overview

Once a rare treasure attainable by only the elite of society, through a significant part of the 20th century, pearls held status as a fashion staple of the women in most economic classes, a trend…

Amethyst

Amethyst, the purple-violet variety of quartz has been revered and used by many different cultures. A multitude of symbolisms and spiritual powers have been ascribed to it throughout millennia. Although there were a number of…

Yellow Sapphire

Fancy sapphires have been around and popular for different reasons as much as ruby and blue sapphire. The broad color spectrum of fancy sapphires is very appealing to many consumers. Yellow sapphire, also known as…

Tsavorite Garnet

The colored gem market has more to offer than the big three (ruby, sapphire and emerald) in recent decades. Availability of bigger and higher quality garnets in a range of colors beyond the classical red varieties…

Bi-Colored Sapphire

Ruby and blue sapphire may be the most popular varieties of corundum but nature is capable of producing other interesting varieties too. Although commonly known for tourmalines (watermelon) and quartz (ametrine), multicolored examples exist in…

Sphene

Consumers are more aware of unusual and rare gems in the global market. This awareness is supported by high end jewelry designers using stones such as sphene. This fiery gemstone’s correct mineralogical name is titanite…

The Big Three Plus Diamond

The GemGuide has now been publishing colored gemstone prices since 1982 and diamond prices since 1985. During the past 35 years, gem prices have fluctuated for various reasons. The chart that appears below is a…

Morganite

Demand for pink gemstones has been fairly strong in recent years. Morganite, the light pink to orange-pink variety of beryl, has been entering the market in greater than typical quantities during the past few years…