A foreign substance, either liquid or solid, usually of minute size, inclosed in the mass of a mineral.

A physical and mechanical discontinuity occurring within a material or part, usually consisting of solid, encapsulated foreign material. Inclusions are often capable of transmitting some structural stresses and energy fields, but in a noticeably different manner from the parent material.

An element of glass or a foreign body enclosed in glass.

Nonmetallic materials that become part of a metal matrix usually through reoxidation, refractories, slag, and deoxidization products.

(in kloo' zhun) - A body of foreign material enclosed within the primary matrix of a meteorite.

Impurity (can be surface or internal)

a rock or liquid that is enclosed in another foreign kind of rock or mineral

During solidification of the liquid steel, non-metallic particles, like e.g. slag residues, ceramic furnace lining particles, deoxidization products, etc. can be included and prevented from elevation. Predominantly, these are oxides or sulfides. Inclusions can segregate, i.e. they are irregularly spread in the steel. In the forming process they are stretched to streaks and cause stability differences longitudinal and transverse to the direction of rolling. Inclusions (e.g.: titanium) in the tube surface disturb the surface finishing.

Inclusions are foreign deposits within gemstones such as foreign minerals, cracks, or liquids. They occur naturally during crystal growth and may also result from intense pressure. Some inclusions are visible to the naked eye and some can only be seen with a loupe. While they sometimes affect the appearance of a stone, they can also help verify authenticity and reveal stone origins.

An impurity or foreign body in the stone that reduces the homogeneity of the rock.

A geometric or mechanical discontinuity occurring in a material or structure usually consisting of a solid foreign body.

Foreign material in the metal or impressed into the surface.

a particle of foreign matte r contained within a mineral

a particle of foreign matte r contained within a stone

The general term used to describe foreign materials or cracks, etc. inside gemstones.

Presence of a foreign matter in finished formulations.

Any foreign matter of particles that are either encapsulated or imbedded in the pultrusion.

In its broadest sense, any optically detectable irregularity in a gem material. In a narrower sense, any foreign material caught up during the growing or formation process. Inclusions are usually used to map and identify a specific stone.

Slag or other foreign matter entrapped during welding. The defect is usually more irregular in shape than a gas pore.

An inclusion is a particle of foreign matter that can be solid, liquid or gaseous, contained within a mineral. Many inclusions decrease the value of a stone, but some, like rutile forming asterisms in star sapphires and needles in rutilated quartz and tourmalinated quartz, increase the value of the ...

particle of foreign material embedded within a metal product that, if left unattended could cause the material to fail. Because of the nature of titanium mill product processing most inclusions found are either oxide, sulfide, or silicate compounds.

Any visible internal foreign object in a diamond is called an inclusion.

Any foreign mineral or substance "included" within a gemstone. Though generally considered to be flaws, they sometimes enhance the value of certain gems.

An inclusion is a particle of foreign matter contained within a mineral. Inclusions can be solid, liquid, or gaseous. Many inclusions decrease the value of a stone, but some, like rutile forming asterisms in star sapphires and needles in rutilated quartz and tourmalinated quartz, are prized.

A nonmetallic material in a solid metallic matrix. (2) Particles of impurities (usually oxides, sulfides, silicates, etc.) that are held mechanically or are formed during the solidification or by subsequent reaction within the solid metal. (3) Non-metallic materials in a solid metallic matrix.

Particle(s) of impurities (usually oxides, sulphides, or silicates) which separate from the liquid steel and are mechanically held during solidification. In some grades of steel, inclusions are made intentionally high to aid machinability.