Lemon Quartz | Gemopedia

Named for its refreshing and invigorating yellow color, the strong citrus tones of this gem type are an unusual quality in the gemstone world. The radiant beauty of lemon quartz gems is dazzling, particularly when light dancing from its facets and it truly comes to life. The lemon color is most likely caused by iron breaching the color centers of the stone. The difference between citrine and lemon quartz is in their saturation and color tone. Because of their color similarity, many gem dealers do not even separate the two and use the name citrine for all yellow quartz.
Alternate
Names
Oro Verde Quartz
Colors
Bright Yellow

Lemon Quartz Classification

Common Name

Lemon Quartz

Species

Quartz

Variety

Lemon Quartz

Colors

Bright Yellow

Alternate Names

Oro Verde Quartz

Gemstone Groups

Key Separations

refractive index, birefringence, optic character and optic figure. Careful observation that reveals Brazil-law twinning separates lemon quartz from scapolite with similar properties.

Comments

The lemon color is caused by irradiation.

Lemon Quartz Optical Properties

Transparency

Transparent - Translucent

Refractive Index

1.544-1.553
Tolerance:very constant

Birefringence

0.009

Optic Character

Uniaxial

Optic Sign

Positive

Polariscope Reaction

Doubly Refractive (DR)

Fluorescence

SWUV: Inert
LWUV: Inert

CCF Reaction

Pleochroism

Dichroic, unobservable or weak, varying shades of body color

Dispersion

Strength: weak fire Value: 0.013

Comments

Lemon Quartz Chemistry & Crystallography

Chemical Name

silicon dioxide (aka silica)

Chemical Formula

SiO2

Synthesis

Crystal System

Trigonal

Classification

Silicate

Nature

Natural

Crystallinity

Crystalline

Comments

Lemon Quartz Characteristic Physical Properties

Hardness

7

Streak

White

Specific Gravity

2.64-2.69 Typical:2.66

Toughness

Good

Inclusions

Lemon quartz is a type I clarity stone. Color zoning often present in lemon quartz in the form of "tiger stripes" or "zebra stripes". Stones my contain crystals, negative crystals, liquid inclusions, two-phase inclusions and partially healed fractures.

Luster

Vitreous

Stability

Good

Fracture

Conchoidal

Cleavage

None

Comments

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