I have finished a modified Cleopatra’s Eye cut (designed by Bob Keller) in Gladstone smoky quartz. I have called it the Eye Of Comstock after the historic lead-zinc-silver deposit, west of Zeehan Tasmania. The modifications to the cut I made were mostly in the crown of the stone, I left off the top couple of tiers of facets and free-wheeled the pupil in. I also nicked both ends of the stone to reduce the chance of any girdle chipping in this area if the stone is set into jewellery.
The stone is of a suitable size to make a nice cocktail ring or pendant: L x W x D = 25mm x 18mm x 16mm approximately, for a weight of 32.6 ct. It is a very clean stone ~ eye clean, with nice colour saturation – not too dark to affect the optical performance of the stone, but rich enough to add a nice level of complexity to the final effect. The light return in this stone is stunning.
Perhaps a 1.3 – russetmuscat on the whisky chart…. Na zdraví.
I got a fantastic facet-grade Gladstone smoky quartz crystal from Richard at the Zeehan Rock Shop.
The aim was to create something big, interesting and unique. Now, the crystal was already just that in its natural state, so I decided to try and preserve some of what made it so nice already, while at the same time exposing some of its other beautiful features. One of the neat properties of the crystal is the well-formed hexagonal cross-section, I decided to preserve this natural six-sided prism shape whilst still using faceting techniques to add something extra – in an optical sense.
I wanted to ultimately cut two stones out of the crystal, so I sliced it neatly – almost in half. The crystal termination (or pointy end) made for a good natural preform for a pavilion.
I chose a hexagonal cut for the pavilion facet component, “Hard Roku” by Marco Voltolini.
So, I created the pavilion according to the angles of the Hard Roku design above, with an interesting transition from polished facet to dimpled natural crystal face. The natural but imperfect hexagonal crystal shape meant that the faceting is not exactly symmetrical, but I like that – and I think it works.
That big round facet up front took hours to polish. The effect is mesmerising, like a natural kaleidoscope – at the right angle you get the ability to look far into the optical and crystallographic axis of the crystal, in fact an illusion is created where you appear to be seeing further than the length of the stone itself, into what eerily resembles an eye. Note that it is very hard to capture this effect in a photograph, however.
The rim is frosted and light from the back facets projects onto it.
The stone came in at about 48 grams, and 40mm across the flats at the widest dimension.
Indicolite is a rare, steely-blue coloured form of tourmaline highly prized as a gemstone. Above are two views of a piece of rough I have at hand weighing around 18ct. You can see in these pictures a bit of the blue-green dichroism typical of tourmaline exhibited by viewing the crystal in different directions.
The tourmaline piece is included, however I feel like using this as a feature – any inclusions present will hopefully provide extra interest to the stone when cut.
This interest is sometimes called the garden, a term often used when describing the rich suite of inclusions typically present in emeralds. Just in this case my garden has blue grass. If you want a stone as clear as glass, go and get a synthetic one I say, they’re real cheap, lol. I am sure the jewellery store at the local shopping mall will be able to help.
I have ground a small flat plane on one crystal edge to provide a base for securely dopping (affixing) the stone to a small brass holder (dop) using super glue (cyanoacrylate).
The cut is designed to give a nice colour flash when rocked along the long-axis. I like flashes in faceted stones – it’s the light-return happening, its real purty. This cut has 90.7% light return as specified by the designer … nice. What this means in simpler terms is that of all the photons (light rays) incident on the facets of the top crown, around 90% of them are bounced back into your waiting eyes. This is a good thing. Who wants a dull stone? The astute may notice that I have oriented the stone at 90 degrees to the cutting diagram above, so my colour flash should happen when the completed stone is rocked along the short axis.
Yes, the stone is flawed. I think it is still worthwhile, attractive and of value. After all, we are all deeply-flawed human beings I say. It’s up to us to make the most of any strengths to offset any perceived weaknesses.