STONE GUIDE

AUSTRALIAN PARTI SAPPHIRE

  • MINERAL-CORUNDUM
  • COLOUR-BLUE, GREEN & YELLOW
  • MOH'S HARDNESS-9
  • BIRTHSTONE-SEPTEMBER
  • ANNIVERSARY-5TH, 45TH & 65TH
  • MEANING- The Parti Sapphire, in all its celestial hues, is a stone of wisdom and royalty, of prophecy and Divine favor.

Parti Sapphires (short for partition) is a stone that contains two colours due to a natural blending. Parti sapphires cannot be manufactured, so you’re assured of a precious, one-off piece when you choose this type of stone.

GRADING

Parti sapphires are graded like other sapphires in terms of carat, cut and clarity, but it is the colour that sets them apart. As the crystal is forming, different colours appear depending on the trace elements present, creating different zoning of blues, greens and yellows. Sometimes only two of these colours appear, whereas other stones display all three. For this reason they can also be known as bi-coloured or polychrome sapphire.

When inspecting a parti sapphire, be sure to move the stone and view it via different angles, this way you can best assess its colour. The best gem cutters will work very carefully to maximise the raw crystal and colour zoning to highlight these colours.

 

RAINBOW MOONSTONE

  • MINERAL-FELDSPAR
  • COLOUR-COLOURLESS, YELLOW, PALE SHEEN 
  • MOH'S HARDNESS-6.5
  • BIRTHSTONE-JUNE
  • ANNIVERSARY-13TH
  • MEANING- Since earliest times, Moonstone has been a tangible connection to the magic of the moon - an amulet of protection for travelers, a gift of lovers for passion, a channel for prophecy, and a path to wisdom.

The name "moonstone" was coined by the ancient Greeks to describe gemstones that displayed the moon's ethereal silvery light.

GRADING

When selecting moonstones, we look for three key factors: bodycolor (background color) and color and orientation of the sheen.
 
Moonstones range in appearance from semitransparent to opaque and colorless to white, with a blue, silver, or white adularescent effect. Moonstone bodycolors vary widely. They can be green, yellow to brown, or gray to nearly black. Along with adularescence, some moonstones show chatoyancy, also called the cat’s-eye effect. A few show four-rayed stars in an effect called asterism. 

 

ROSE QUARTZ

 

  • MINERAL-QUARTZ
  • COLOUR- OPAQUE TO TRANSLUCENT PINK TO ROSE RED 
  • MOH'S HARDNESS-7
  • BIRTHSTONE-JAN
  • ANNIVERSARY-5TH
  • MEANING- Rose quartz is often called the "Love Stone." It's energetic hallmark is that of unconditional love that opens the heart chakra

GRADING

Tiny inclusions are responsible for the translucent appearance of most rose quartz. Finest-quality rose quartz is often transparent, so it’s usually faceted. The inclusions in rose quartz can create a display of asterism when the gem is cut as a cabochon

 

AUSTRALIAN INK BLUE SAPPHIRE

  • MINERAL-CORUNDUM
  • COLOUR-DARK BLUE
  • MOH'S HARDNESS-9
  • BIRTHSTONE-SEPTEMBER
  • ANNIVERSARY-5TH, 45TH & 65TH
  • MEANING-  Sapphires signify the height of celestial hope and faith, and was believed to bring protection, good fortune and spiritual insight

Sapphire is the mineral corundum and is only second in hardness to diamond on the Moh’s scale, making it a great choice for a ring or piece of jewellery that will be frequently worn. These gems are formed as the result of volcanic activity, sometimes described as basalt hosted. Stones are recovered from both secondary deposits along current or previous watercourses, and primary or reworked pyroclastic flows or volcanic mudflows (lahars).

GRADING

Colour is the major factor when grading sapphire. Composed of aluminium and oxygen, trace elements like iron and titanium cause their colour. Due to the high iron content in Australian sapphires, they are typically dark blue and sometimes close to a black colour. However, some brighter blues can also be found, as well as yellows, greens, and parti coloured stones that show a combination of colour like green and yellow, or blue and yellow.

Sapphires come in all kinds of cuts and sizes, from small calibrated gems to large outstanding collector's items. Most sapphires are cut to maximise their colour, so they tend to be deeper in cut than white diamonds.