Heliodor (Synthetic) | Gemopedia

Hydrothermally grown synthetic heliodor gems crystallize slowly out of a solution (a mix of water and dissolved elements) that has been exposed to heat and pressure similar to the conditions on Earth under which the natural gem mineral grows. Synthetic gems have the same chemical, optical, and physical properties of their natural counterparts, but are a more cost-effective alternative to a natural gem.
Colors
Greenish Yellow To Orangy Yellow

Heliodor (Synthetic) Classification

Common Name

Heliodor (Synthetic)

Species

Beryl

Variety

Heliodor

Colors

Greenish Yellow To Orangy Yellow

Alternate Names

Gemstone Groups

Key Separations

Magnification, refractive index, birefringence, optic character

Comments

Heliodor (Synthetic) Optical Properties

Transparency

Transparent

Refractive Index

1.577-1.583
Tolerance: (+0.017/-0.017)

Birefringence

0.005-0.009

Optic Character

Uniaxial

Optic Sign

Negative

Polariscope Reaction

Doubly Refractive (DR)

Fluorescence

SWUV: Inert
LWUV: Inert

CCF Reaction

Pleochroism

Dichroic, weak to moderate varying shades of body color

Dispersion

Strength: weak fire Value: 0.014

Comments

Heliodor (Synthetic) Chemistry & Crystallography

Chemical Name

beryllium aluminum silicate

Chemical Formula

Be3Al2(SiO3)6

Synthesis

hydrothermal

Crystal System

Hexagonal

Classification

Silicate

Nature

Synthetic

Crystallinity

Crystalline

Comments

Heliodor (Synthetic) Characteristic Physical Properties

Hardness

7.5

Streak

White

Specific Gravity

2.67-2.9 Typical: 2.72

Toughness

Good

Inclusions

Synthetic helidor is typically eye clean. Due to its synthetic nature chevron, zig-zag or undulating growth zoning is apparent. Liquid and 2-phase inclusions can sometimes be scene along with nail head spicules.

Luster

Vitreous

Stability

Good

Fracture

Conchoidal

Cleavage

Poor, in one direction

Comments

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