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QuantzStudios

Completed Listings

Montana Sapphire 2.10ct. 6.70mm Cut in a Portuguese square with step-cut crown. An amazingly vivid pure blue stone with a lighter greenish-blue along the other crystal axis. An exceptional color in an exceptionally rare, large size from any locality, let alone Montana. The tone is medium dark to dark, and clarity is very slightly included. This stone has been heated as many Montana stones are. *Photos taken with an iPhone 5 in natural daylight. More pictures or video available upon request.
Colored Gemstone
November 19, 2015
$2,000
SALE PENDING. Green/green-blue tourmaline from Afghanistan. Very bright and great color mixing between the two axis. Cut in a step cut rectangle. Untreated and eye-clean. Photos taken with iPhone in natural daylight. 1.05ct. 4.83 x 7.01mm
Colored Gemstone
November 19, 2015
$340
Pink tourmaline from Nigeria in a bright, vivid and almost neon bubblegum pink color. Cut in the well-known Supernova Oval design by me. Untreated and slightly included, though with the unaided eye the stone appears very clean. Photos taken in various forms of sunlight. 2.48ct. 7.57x9.51mm *7-Day return policy if not satisfied.
Colored Gemstone
December 17, 2015
$395
Marlborough chrysoprase, from Australia. This is from my stash of absolutely top grade material- You simply will not find better chrysoprase. The color is saturated and vivid, the translucency is ideal and the stone glows with green color. Cut by me, into an oval. I dont cut much of this premium material lately because it is so hard to find this quality anymore. Untreated. 17.28ct. 22.75mm x 13.30mm
Colored Gemstone
June 1, 2016
$440
1.21ct. 5.9mm sapphire from Madagascar, unheated. I acquired this some years back from Jeff Hapeman at Earth's Treasury and it's reluctantly time to sell it.
Colored Gemstone
September 23, 2019
$1,100
Beautiful assortment of bright afghan tourmaline rounds. Eye clean and untreated and well-cut. 1.50ctw. 4.15-4.40mm rounds.
Colored Gemstone
February 25, 2020
$242
Australian opal.. Darker grey base with slight translucency. Multi-color, with a lot of red in an almost-harlequin pattern. 0.65ct 5.50x8mm
Colored Gemstone
February 25, 2020
$290
Russian Demantoid garnets, in a rare, neon green suite of rounds. 10 stones 0.76ctw Calibrated 2.50mm sizes. Clarity is mostly eye clean to VS. Thhere are two that don't quite match up perfectly with the rest up close, but use those for earrings!
Colored Gemstone
April 6, 2020
$244
Pakistani peridot. Step cut beauty! 2.80ct. 6.36mmx7.63mm. Eye clean and untreated.
Colored Gemstone
April 6, 2020
$210
Afghan tourmaline. This stone is so pure and bright green with the perfect amount of blue, in my opinion. It’s eye clean also. 1.30ct. 5.65x6.89mm. Untreated.
Bands
April 6, 2020
$200
1.55ct Spinel.. 6mmx7mm custom mixed radiant cut. I'm not entirely sure of the origin but I suspect SriLanka. It's eye clean but has a few small, low-relief inclusions under magnification. The color is medium to medium-light lavender-pink, but shifts more toward warm pink in different lighting. Photos taken outside on an overcast day, some diffused and some not.
Colored Gemstone
October 11, 2020
$140
Men's 14k white gold ring, 24 diamonds totaling approximately 1.84ctw All are SI1-SI-2 . 14@ approx. 0.06ct, 2.5mm 10@ approx. .10ct, 3mm Approximately 10.5 grams metal. Size 11 1/2 Metal and stones were verified at the jewelry store I work in. I have restored this ring to like-new condition (It only saw light wear), HOWEVER it could use a rhodium plate- We don't have plating capabilities at this time. We can discuss your preferred shipping method. *The photos uploaded are macro images and I can email them directly for better detail and image size.
Natural Diamond Center
January 19, 2022
$2,150
Four pairs of Sri Lankan spinel, for earrings or whatever! These are quite bright and vivid, and with great durability spinel is quite under-appreciated! These have excellent cutting and are untreated. Bubblegum pink- 2.68ctw 6x8 Darker pink-red- 1.58ctw 5x7 Lighter pink-red- 1.68ctw 5x7 Medium lavender-purple- 1.60ctw 6mm Shipping to the US included.
Colored Gemstone
May 10, 2022
$940