Rock Family: Metamorphic Rock
Major Minerals: Ruby + Cordierite, Fuchsite, Kyanite or Zoisite
Minor Minerals: Pargasite

Color: Multicolored
Gravity: Varies widely, Ruby is the heaviest at 4.1, Cordierite is the lightest at 2.5
Hardness: Varies widely, Ruby is the hardest at 9, Fuchsite is the softest at 2.5
Luminescence: Red
Texture: Gneissic
Transparency: Opaque

Where do Ruby Combinations come from?

Ruby Combination Placeholder
Ruby Combination

Ruby Combinations can be found anywhere Rubies grow.  However most of the Ruby Combination stones on the market come from India, with the exception of Ruby Zoisite which is from Tanzania.

What is a Ruby Combination?

Ruby Combinations are not a single mineral, but rather a rock. As an easy way to understand the difference, think of rocks as being like cookies and minerals as being the ingredients which make up those cookies. Many different minerals are used to create a rock! In the case of Ruby Combinations several minerals may be present.

  • Ruby Cordierite: grey/tan Cordierite (Iolite), red Corundum (Ruby)
  • Ruby Fuchsite: green Fuchsite, red Corundum (Ruby), may also have blue Kyanite, white Muscovite and/or Quartz
  • Ruby Kyanite: blue Kyanite and red Corundum (Ruby)
  • Ruby Zoisite: green Zoisite, red Corundum (Ruby), and black/dark green Pargasite.

How are Ruby Combinations formed?

Ruby Combination is a type of metamorphic rock created by regional metamorphism and hydrothermal alteration. Rubies as well as Cordierite, Fuchsite, Kyanite and Zoisite are all formed during the metamorphic process, and in rare cases may naturally fuse together into a single stone. Regional metamorphism occurs when there is a collision between tectonic plates, causing geological changes over a large area. Hydrothermal alteration happens when underground water is heated up to incredibly high temperatures. The hot water flows through minerals, leaving traces of other minerals in its wake, which can then grow in combination over time.

How are Ruby Combinations mined?

Pure Ruby is often mined at a secondary deposit in the gravel beds of rivers.  But Ruby Combination stones are often mined at the primary location and removed directly from the bedrock.  The mines can be pits or tunnels, typically artisanal or small-scale.

Are Ruby Combinations real?

The Rubies in Ruby Combination stones aren’t gem-quality, so they have been left in their natural matrix.  They are completely natural, enhanced only by cutting and polishing.