I started this blog talking about gray gemstones. When I started my search, I kept coming up empty with what I wanted, until a gemstone that was pretty under appreciated came to my attention – gray spinel. But there wasn’t really any out there.
It turns out that people are reluctant to cut a gray gemstone, because everyone wants bright highly saturated gemstones.
These are some of the stones that were bought (and some since sold) in my quest for exactly what I wanted. One note about gray spinels is that they are incredibly difficult to photograph. They are very temperamental and reflect everything in their environment, and as a result, they are exceptionally problematic to photograph.
The Scale of Gray (SOG) is a scale of 1-10, with one being colorless and 10 being black. The idea for this was based on the art and graphic design principle of grayscale: Wiki article on Grayscale
(Image taken from google image search)
These two spinels are almost colorless. Spinel is typically not colorless and almost always has a modifier of some other color. To be colorless, spinel cannot have impurities. These spinels are so close to colorless that I cannot discern a modifier in them. I consider these stones a 1 on my Scale of Gray. The round stone looks darker here than it is in real life. I will attempt to get a better picture of it and replace it at some point in time.
Round stone: Artistic Colored Stones
Pear Recut: Gemart Services
This spinel is a very slightly silvery gray, so much so that it’s almost imperceptible unless the stone is on a white background. It can appear colorless at times, especially when in a bright lighting situation. I consider it a 2 on the SOG.
This stone is deep enough in tone so that the gray color is apparent even when the stone is on a colored background, such as skin, as seen in this picture. This stone can appear to look colorless in certain lighting conditions. I consider this stone a 3 on the SOG. Round: Jeffery Davies Gems & Jewelry
This stone is what I consider a 4 on the SOG. It is definitely gray in most lighting situations and never appears colorless. Sometimes it can look lighter gray and sometimes it can appear a darker gray, but only blacks out under bright direct sunlight. Round: Julia B Jewelry
I consider the following stone a 5 on the SOG. Sometimes it appears to be a lighter gray, and sometimes it appears to be darker, but the body color is a clear medium gray. Round stone: Artistic Colored Stones
This asscher cut from Ryan Quantz is finally being added to the the line up as a 6. This stone always appears gray, sometimes can appear silvery when the pavilion facets reflect light, and sometimes can appear black in very low lighting situations.
This stone is what I would consider a 7 on the SOG. It often appears darker gray and never appears colorless. Sometimes the facets reflect light, making it appear medium gray, but overall, this gray color is always going to appear to be darker.
This spinel is an 8. It’s body color is decidedly dark, and unless it is in very bright lighting situations, it will appear to be very dark or black.
I consider this stone to be an 8.5 on the SOG. It is a darker gray, often appearing to be black, and when it does not appear black, looks very dark gray, and may have a lighter flash move across the pavilion facets. Cushion: Gemcal
I consider this stone a 9 on the SOG. The majority of the time, it appears to be black, and only sometimes appears to be gray, typically with sparks of color. Black is considered the absence of light, so I cannot in good faith call this “black” because light travels through it to some extent. Cushion: Custom Gemstones
I feel as though there has been an increase in popularity in gray spinels, which is great and terrible, all at the same time. I think it’s wonderful that people are giving attention to a neglected color, but at the same time, they are driving up demand, and as a result, prices.
I am constantly on the lookout for these underappreciated gemstones. Nothing really makes me quite as happy as an amazing gray spinel!
The Gemstone Project 