Gemart Services — Gems for Sale

Custom Gemstone Faceting and Lapidary Service

We offer our stones for sale from a perspective of having been professional gem cutters for 15 years with an eye toward proper cutting, value and design. Some of the stones we offer are custom cut by ourselves and others may be cut overseas to our specification, and still others were acquired by us based on the value that we recognize. Our stones are photographed with a Canon A17 camera in regular outdoor shadow, under a clear sky. All stones are offered with 100% satisfaction guaranteed.

The order procedure is automatically set up to pay through PayPal. However, it isn't necessary to use PayPal. We would gladly sell any items here with a personal check or Money Order. Please don't hesitate to communicate via email if there is interest in any stone or there is a question or if more information is desired. We welcome your inquiry.

Quick Links


Amethyst
  • A bright and showy lighter colored Amethyst faceted by Jeremy Newman in his "Cascade Triangle" pattern.
  • Size: 15.55mm, 15.43ct
  • $15/ct, $231 total

Ametrine
  • A large very showy and unique mix of amethyst and citrine from the world famous Bolivian mines. The pattern is called "Super Nova" by Long and Steele and was faceted by Jeremy Newman. It has 87 facets and has spectacular flashes in direct light.
  • Size: 23×17mm, 32.62ct
  • $25/ct, $815 total

Aquamarine
  • This is a pale blue aquamarine from Pakistan faceted by Jeremy Newman in the traditional "Emerald" cut so often used for this gem material. It is flawless and quite showy.
  • Size: 20×14mm, 17.94ct
  • $75/ct, $1345 total

Citrine
  • Beautiful golden-orange sparkler Barion cushion faceted by Jeremy Newman.
  • Size: 16×13mm, 10.38ct
  • $25/ct, $259 total

Rio Grande Citrine
  • Beautiful orange "Rio Grande" Citrine in the unique 139 facet Paver Trilliant design by Jeremy Newman. The raw material is man made hydrothermal quartz grown in Russia.
  • Size: 15.5mm Trill, 11.8ct
  • $15/ct, $177 total

Lemon Citrine
  • Cut by Jeremy Newman in his unique "Paver Trilliant" design with 139 facets.
  • Size: 18mm, 17.12ct
  • $25/ct, $428 total

Lemon Citrine
  • This large showy rectangular brilliant was cut by Jeremy newman from the same crystal chunk as the accompanying Paver Trilliant. This pattern is called "Formee Cross" by Robert Strickland and has 75 facets.
  • Size: 19.5×16.22mm, 26.71ct
  • $15/ct, $400 total

Fluorite

Fluorite, with a Refractive index of only 1.43 and relatively weak dispersion, is not noted for its optical properties. This faceted stone truly represents the finest that this material can offer. The unique cutting design certainly releases all its potential. It belongs in a museum for the world to see or a collectors cabinet. If your goal as a collector is to collect quality and beauty, this is a true candidate for your collection.

Fluorite comes in colors that range from yellow green to purple and all colors in between — mostly blues, greens and purples and in some banded combinations. Fluorite ranks 4 on the Mohs hardness scale. It is found worldwide, but rarely with such clarity at this size.

FLUORITE
  • This stone measures 40×35.5mm and 32.5mm deep and weighs 262cts.
  • $19/ct — $4978 for the stone
  • With the exception of a very small incipient cleavage under one corner the stone is flawless.

Spessartine Garnet
  • A true Mandarin Orange Spessartine Garnet from Africa, cut in the Far East. An outstanding value at $175/ct.
  • Size: 7.9×9.6mm oval, 3.46ct
  • $175/ct, $605 total

Morganite
  • Extra fine cut, color and liveliness. Custom cut by Jeremy Newman in a pattern called Etoile by Paul Rivard.
  • Size: 12.5mm, 9.83ct
  • $80/ct, $786.00

Peridot
  • These stones are from the world famous and classic location on the Apache Reservation in San Carlos, AZ. Color is world class green and is the standard by which others are judged. Both were faceted by Jeremy Newman in his own designs called "Cascade Square" and "Cascade Triangle".
  • Size: 8mm, 2.74ct
  • $70/ct, $191 square
  • Size: 8mm, 3.07ct
  • $70/ct, $214 triangle
  • $385 for both (contact us to purchase the pair)

American Sapphires

Sapphire is very hard and durable having a Moh’s hardness of 9. It has a relatively high Refractive index of 1.76 and very good dispersion, making it an ideal gem material. Sapphires are one of our favorite gemstone. We go back 20 years when we took our first vacation together to guess where? Yes we had to go mining Sapphires in Montana. We enjoyed it so much we have made numerous visits back there since then.

After accumulating a good supply of wonderful rough sapphire we decided to release their inner light. Hence, we faceted some and chose some to send to a reputable cutter overseas to be cut to our spec. They have been in our family for a while and have decided to offer them to the public. Color, a factor in the beauty of gemstones, is not as clear-cut as history would lead us to believe with Sapphire.

While many gems are thought of as being associated with a unique color, this isn’t necessarily the case. Sapphire comes in all colors besides the traditional blue. They may be of a solid color or they may meld a few colors together for some interesting lights. You might say they are each unique in how their glow comes through. All of our Sapphires are at least eye clean, except where noted otherwise. These Sapphires are priced to sell by the lot but will be sold separately at a premium.

BLUE MONTANA SAPPHIRE
  • These 6 stones range from 1.17ct to .41ct
    (Pictured in this order: 1.17ct, .81ct, .63ct, .50ct, .43ct, .41ct)
  • Sizes are from 6.6x5.4mm oval to 4.5mm
  • Color is vibrant blue and the stones are eye clean or better
  • 6 stones (3.95cttw) @ $150/ct — Lot $592 — select $200/ct (contact us for select stones)

YELLOW MONTANA SAPPHIRE
  • These 5 stones range from .50ct to .61ct
  • Sizes are from 4.7mm to 6.0mm
  • Each stone projects its own expression of yellow/golden/orange hue.
  • 5 stones (2.72cttw) @ $150/ct — Lot $408 — select $200/ct (contact us for select stones)

MIXED COLOR MONTANA SAPPHIRE
  • These 3 stones range from .28ct to .86ct
  • 6.5×4.2mm rectangular cushion
  • 6.6×5.0mm oval
  • 6.6×5.4mm oval
  • Color is subtle pink overtone with differing highlights and the stones are eye clean or better
  • 3 stones (1.95cttw) @ $75ct — Lot $146 — select $100ct (contact us for select stones)

The Artist's Pallette of Sapphire Colors

These Montana Sapphires suites were obtained by Gemart Services when much of the collection of American Sapphire Corp. was liquidated. These miniature colorful stones will whet your creative appetite. Use them by themselves or accentuate a larger stone. These are sold only by the lot and are eye clean.

  • The 39 stones are 2.1mm each
  • Average weight .050ct
  • Colors flow in various hues of lavender to clear to yellow to orange.
  • 39 stones (1.95cttw) @ $75ct — Lot $146 — (That is $3.74 per stone!)

  • The 35 stones are 2.5mm each
  • Average weight .080ct
  • Colors flow from deep peach/pink to yellow to blue
  • 35 stones (2.80cttw) @ $75ct — Lot $210 — (That is $6.00 per stone!)

More Montana Sapphire

This batch is of a lesser quality than the above. In our opinion either the color uniformity, density, or internal clarity is more questionable. We are selling these stones at a bargain price.





  • These 19 stones range from .50ct to 1.76ct
  • Colors are dark blue, blue green, orange, deep salmon, pale green, and some carry a color "gumdrop" center spot.
  • Left lot (blue) 9 stones, 8.52cttw @ $50/ct = $426

  • Center lot (mixed colors) 5 stones, 5.94cttw @ $50/ct = $297

  • Right lot (mixed colors) 5 stones, 4.92cttw @ $50/ct = $246


Other Sapphires

Orange Sapphire
  • A natural, heated sapphire from southeast Asia recut by Jeremy Newman to enhance it's optical performance. A beautiful and unusual sapphire.
  • Size: 7.5mm, 2.18ct
  • $250/ct, $545 total

Spinel

Lot prices as indicated. Individual pick from lots 25% premium.

Spinels Gemology

Spinel, a magnesium, alumina silicate, with a Refractive index of 1.72 has great optical properties. Due to its hardness (8 on Mohs scale) and high clarity, spinel produces fine jewelry. Spinel is never treated in any way and continues to be a great substitute for Ruby and Sapphire as well.

The most well known spinel deposits are found in Cambodia, Myanmar, Sri Lanka and Thailand. Other locations are in Afghanistan, Australia, Brazil, Madagascar, Nepal, Nigeria, Tadzhikistan, Tanzania and the United States.

Spinel is a special gemstone in many ways. For centuries it was mistaken for ruby and gained undeserved fame. Some famous large "rubies", such as the "Black Prince’s Ruby" and the "Timur ruby" in the British Crown Jewels are actually spinels.

The two largest spinels, each 520ct, are on display at the British Museum.

Spinel Colors

Spinel can be found in a range of beautiful pastel shades in addition to red. These amazing shades of pink, purple, orange, blue, plus every combination in between make spinels some of the most desirable stones in the world!

Spinel: Merlot Red Tray
  • 10x8mm oval, 2.72ct
  • 7.5mm round, 1.81ct
  • 6.7x5.5mm, 0.97ct
  • 7.3x6mm, 1.06ct
  • 7.1x6.2mm, 1.16ct
  • 7.9x6.3mm, 1.42ct
  • 7.5x6.5mm, 1.49ct
  • Lot 10.63cttw @ $75/ct = $797

Spinel: Scintillating Red — Moguk Spinel (native cut)
  • 5.8x5.5mm cushion square, 1.08ct
  • $200/ct, $216 total

Spinel: Rhubarb Pink
  • 16x10.5mm oval, 9.27ct
  • $50/ct, $463 total

Spinel: Rhubarb Pink
  • 14x10mm oval, 9.75ct
  • $50/ct, $487 total

Spinel: Sapphire Blue
  • 9mm round, 2.71ct
  • $125/ct, $338 total

Spinel: Merlot Red Sparklers
  • 5.9×4.8mm oval, 0.66ct
  • 7.6×6.2mm oval, 1.51ct
  • 7.8×6.4mm oval, 1.42ct
  • 2.8cttw @ $35/ct, $100 total

Spinel: Lush Red
  • 4.2mm round
  • 0.72cttw @ $75/ct, $54 total

Spinel: Pink Ovals
  • 6.8×8.5mm, 1.75ct
  • 7.7×7.9mm, 1.55ct
  • 7.3×6mm, 1.17ct
  • 7.5×6mm, 1.19ct
  • 6.9×5.6mm, 0.99ct
  • 6.65cttw @ $75/ct, $498 total

Spinel: Pink Ice
  • 6.3mm round, 0.97ct
  • 5×6mm oval, 0.72ct
  • 4.6mm round, 0.47ct
  • 4.4mm round, 0.39ct
  • 4.6mm round, 0.44ct
  • 2.99cttw @ $75/ct, $224 total

Spinel: Cranberry Sparklers
  • 7.3×5.5mm pear, 0.91ct
  • 6.1×5mm oval, 0.72ct
  • 5mm round, 0.50ct
  • 4.7mm round, 0.43ct
  • 4.5mm round, 0.39ct
  • 4.1×3.7mm oval, 0.26ct
  • 3.02cttw @ $75/ct, $226 total

Spinel: Cranberry Drops
  • 4×3.5mm oval, 0.22ct
  • 3.3mm round, 0.18ct
  • 3.7×3mm oval, 0.17ct
  • 3mm round, 0.11ct
  • 0.68cttw @ $50/ct, $34 total

Spinel: Pears (custom cut)
  • 7×4.8mm, 0.77ct
  • 6.8×4.5mm, 0.65ct
  • 1.42cttw @ $100/ct, $142 total

Spinel: Miscellaneous sizes and colors
  • Lavender: 9×7×8mm oval, 2.88ct
  • Sapphire Blue: 5.5×4.7mm oval, 0.51ct
  • Sapphire Blue: 4×3.5mm oval, 0.23ct
  • Pink Ice: 5×4.3mm oval, 0.51ct
  • Pink Ice: 4.7×4mm oval, 0.36ct
  • Pink Ice: 4.5×3.5mm oval, 0.24ct
  • Pink Ice: 3.5mm round, 0.18ct
  • Pink Ice: 3.5mm round, 0.21ct
  • Pink Ice: 2.8mm round, 0.09ct
  • 5.21cttw @ $50/ct, $260 total

Tanzanite
  • Sparkly blue lively Tanzanite — Omni Oval design with an apex crown. Cut by Jeremy Newman. A real bargain at $150/ct.
  • Size: 7.5×6 oval, 1.47ct
  • $150/ct, $220 total

Blue Topaz
  • Natural light blue from Brazil. Very showy Radiant Trilliant design by Jeff Graham. Faceted by Jeremy Newman.
  • Size: 18mm, 18.71ct
  • $25/ct, $467 total

Blue Topaz
  • Natural pale blue topaz from Brazil with no enhancements. Cut by Jeremy Newman in the Jeff Graham design called "Noel Oval". It is a very bright and attractive.
  • Size: 21×17.5mm, 28.43ct
  • $25/ct, $710 total

Pink Topaz
  • An uncommon light pink topaz from Pakistan. This unique material usually found quite flawed. But this "Mixed Rectangle" cut by Jeremy Newman shows only one insignificant flaw near one end. It does not detract.
  • Size: 12.5×9mm, 7.42ct
  • $45/ct, $333 total

Topaz
  • This "Platinum" Topaz faceted by Jeremy Newman is a unique apex crown design called "Needle Brilliant" by JoAnne Sisco with 144 facets and displays radiating needles emanating from the culet. It makes a very unusual presentation.
  • Size: 18mm, 27.01ct
  • $8/ct, $216 total

Topaz
  • Very showy electric blue Topaz in a fancy Barion cushion oval design. Cut by Jeremy Newman. Attractively priced at $15/ct.
  • Size: 14.5×11.5mm oval, 9.83ct
  • $15/ct, $147 total

Tourmaline
  • Cut corner rectangle from Afghanistan. Unusually beautiful seafoam color. Emerald cut top with a brilliant cut pavilion. Custom faceted by Jeremy Newman.
  • Size: 12×9mm, 5.75ct
  • $400/ct, $2300 total

Tourmaline
  • A light silver green brilliant cut rectangle with a fancy zig zag crown design. Slightly flawed but still very showy. Bargain priced at $30/ct.
  • Size: 13.5×9.25mm rect, 7.57ct
  • $30/ct, $227 total

Tourmaline
  • Brazilian bi-color Tourmalines in a modified bar cut which emphasizes the very bright striped facet pattern. The stones were recut by Jeremy Newman to bring out their beauty. Very attractively priced at only $35/ct.
  • Size: 16.5×7mm rect, 5.51ct
  • $35/ct, $192 total
  • Size: 24.5×6.8mm rect, 8.33ct
  • $35/ct, $291 total

back to top