Gemstones

Standard shapes and sizes

The core of our assortment is formed by gemstones in standard size and shapes. Standard shapes are the commonly used shapes like round, square, oval, pear, trillion, marquise and baguette.

Generally the standard sizes rage from 2 to 10 mm. Half sizes are available up to 5 mm in a selected group of gemstones. From stock we are able to deliver a wide assortment of gemstones. From tourmaline to sapphire and topaz in different colors to aquamarine, garnet, peridot, and many quarts varieties. Hereafter a list of the most important gemstones.

To view a complete list of all standard shapes and sizes, please view the table below.

  • Amethyst
  • Citrine
  • Smoky Quartz
  • Topaz Sky
  • Topaz Swiss
  • Topaz London Blue
  • Topaz White
  • Iolite
  • Peridote
  • Tourmaline various colours
  • Garnet
  • Rhodolite garnet
  • Tsavorite garnet (up to 4 mm)
  • Tanzanite
  • Spinel (up to 4 mm)
  • Sapphire, ruby and other colours of sapphire (corundum) (up to 4 mm)

Bigger sizes are hard to come across in sapphire, spinel, emerald and tanzanite.

Rond Carré/princess Oval Pear Trillion Baguette Navette
2 2 4×2 4×2 3 4×2 4×2
2,5 2,5 5×3 5×3 4 5×3 5×2,5
3 3 6×4 6×4 5 6×4 6×3
3,5 3,5 7×5 7×5 6 7×5 7×3,5
4 4 8×6 8×6 7 8×6 8×4
4,5 4,5 9×7 9×6 8 9×7 10×5
5 5 10×8 10×7 9 10×8 12×6
6 6 11×9 12×8 10 12×10 14×7
7 7 12×10
8 8
9 9
10 10
11 11
12 12

The standard sizes for cabochons are:

Round Oval Square Pear
2 5×3 3 5×3
3 6×4 4 6×4
4 7×5 5 7×5
5 8×6 6 8×5
6 9×7 7 9×6
7 10×8 8 10×7
8 11×9 9 11×8
9 12×10 10 12×8
10 14×10 14×10
11
12

Specials

Apart form classic gemstones like Sapphire, Ruby and Emerald we have e range of upcoming gemstones like Spinel, Tanzanite and Paraiba Tourmaline in our collection.

We regularly travel abroad to elect and purchase the most beautiful items for you. Here is a small preview of the gemstone in which we specialize:

  • Tanzanite
  • Spinel
  • Rubelite
  • Paraïba tourmaline
  • Rhodolite garnet
  • Spessartite garnet
  • Tsavolite garnet
  • Imperial topaz
  • Peridote
  • Sapphire

Custom sizes and shapes

Through our good contacts in Europe and Asia we offer a large variety of custom cut gemstones.

Let your imagination run wild, our gemstone cutter in India can cut almost anything. From simple cabochons in specific measurements to asymmetrical concave cuts, everything is possible!

 

BirGem Spiegelslijpsel

The BirGem spiegelslijpsel (Mirror Cut) is designed especially for us. At the bottom there are only 8 facets on this roud cut. On the top, besides a big table, there are 8 small facets. This looks like a mirror, the light is absorbed an reflected wonderfully.

Besides the already popular round cut we also have a trillion variety of the BirGem Mirror Cut and maybe the collection of Mirror Cut will broaden in the future.

The standard sizes of the BirGem Mirror Cut are 6, 8, 10 en 12 mm. On request we can cut any desired size.

Our Mirror Cut is available in following well known Quartz varieties:

  • White Quartz
  • Smoky Quartz
  • Amethyst
  • Citrine
  • Rose Quartz
  • Green Quartz
  • Lemon Quartz

We also have blue Topaz in this cut.

Design Cut

At our Gemstone cutter in India we order our design cuts. These cuts are distinguished form the classic cuts by the new technology used when faceting the gemstones. In many designs concave facets are applied to the bottom of the gemstone. The brilliancy that is created is often surprising. Please look at the photo summery for examples.

The Design Cuts are available in the well known Quartz varieties as well as blue Topaz. On request other gemstone varieties can be cut.

 

Briolettes and drops

Brioletten and drops are usually used as earrings or pendants. They are usually top-drilled and are glued as attachment to the jewellery. Briolettes are faceted and drops are smooth.

BirGem has standard pear shaped briolettes in stock in commonly used gemstones such as amethyst, smoky quartz and blue topaz.

Apart from this we have a large changing collection of briolettes and drops in a large variety of gemstones. Besides quartz we also have phrenite, kyanite and labradorite. Also we have a lot of other shapes and a number of different sizes available.