Gemstone profile and identification guide
Lemon Quartz
Lemon quartz is a trade name for bright yellow quartz, commonly achieved through irradiation and/or heat treatment.
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Overview
Lemon quartz is a trade name for bright yellow quartz, commonly achieved through irradiation and/or heat treatment.
Did you know? Lemon quartz color is frequently engineered from quartz precursors rather than mined in that exact hue.
Use this profile as a collector reference and educational guide for quick on-page comparison, then validate with the interactive identification system.
Identification
Name: Lemon Quartz
Scientific classification: Silicate (Quartz Trade Variety, Commonly Treated)
Hardness: 7 Mohs
Transparency: transparent
Lustre: vitreous
Crystal system: Trigonal
Primary colour: Lemon Yellow
Secondary colour: Yellow Green
Colour family: Oranges & Yellows
Color style and market context often indicate treated origin; instrument testing supports confirmation.
Verification Status
Status: verified-core-fields
Reference priority: GIA, Gem-A, Mindat, International Gem Society
Core identity, locality, and physical-property fields reviewed against standard gemological references.
Trade-name entries include conservative composition/treatment disclosures where needed.
Physical Properties
Hardness category: hard
Hardness value: 7 Mohs
Chemical composition: Silicon dioxide (SiO2)
Crystal system: Trigonal
Common locations: Base quartz from Brazil and other quartz localities; color often produced by treatment
Learn more: Gem-A gemstone education resources.
Colour Variations
Bright lemon-yellow quartz, often treatment-derived in commercial gems.
Optical effects: None specified in the current dataset.
Detailed Gemology
Mineral species: Quartz (treated trade variety)
Mineral group: Quartz group
Chemical formula: Silicon dioxide (SiO2)
Mohs hardness: 7
Crystal system: Trigonal
Lustre: vitreous
Transparency: transparent
Streak: White
Cleavage: None
Fracture: Conchoidal
Specific gravity: 2.65
Refractive index: 1.544-1.553
Optical phenomena: None typically diagnostic
Colour range: Lemon yellow to yellow-green
Common inclusions: Typical quartz veils and growth zoning
Geological environment: Natural hydrothermal quartz sources with post-growth treatment
Principal mining regions: Base quartz from Brazil and other quartz localities; color often produced by treatment
Important commercial sources: Lemon quartz is usually a treated quartz product in modern gem trade
Historical significance: Widely marketed modern trade color in quartz jewelry.
Common treatments: Irradiation and heat are common.
Synthetic or imitation forms: Synthetic quartz and glass imitations exist.
Common look-alikes: Citrine, yellow topaz, yellow glass
Jewellery uses: Used in faceted jewelry stones and fashion gems.
Care recommendations: Quartz is durable; avoid prolonged strong heat and disclose treatment status.
Cross-check profile data with GIA Gem Encyclopedia and Mindat entry for Lemon Quartz.
Formation
Natural quartz is color-modified by treatment to produce lemon tones.
Origin
Lemon quartz is usually a treated quartz product in modern gem trade
Uses
Best for: Used in faceted jewelry stones and fashion gems.
Ideal uses: Affordable bright-yellow faceted jewelry with treatment disclosure.
Care
Quartz is durable; avoid prolonged strong heat and disclose treatment status.
Need another candidate? Use advanced gemstone search or return to the identification guide.
Related gemstones by colour
Related gemstones by hardness
Commonly confused gemstones
Lemon Quartz FAQ
How can I identify Lemon Quartz?
Compare hardness (7 Mohs), crystal system (Trigonal), colour profile, and lustre (vitreous) with your sample. Then cross-check related gemstones listed above.
What colour range does Lemon Quartz appear in?
Bright lemon-yellow quartz, often treatment-derived in commercial gems.
Where is Lemon Quartz commonly used?
Affordable bright-yellow faceted jewelry with treatment disclosure.. For maintenance, follow the care guidance in this profile.
Scientific References
GIA: general gemstone identity (reviewed) - Batch 06 factual verification pass.
Gem-A: gemological terminology and testing references (reviewed) - Batch 06 factual verification pass.
Mindat: mineral species and principal localities (reviewed) - Batch 06 factual verification pass.
International Gem Society: gem trade context and treatment overview (reviewed) - Batch 06 factual verification pass.