Diagnostic Features

Hardness: 7
Streak: None
Specific Gravity: 2.7
Luster: Nonmetallic glassy
Cleavage: None
Fracture: Conchoidal
Other: Forms six-sided crystals. Occurs in a variety of colors from clear to yellow, brown and violet. Also exists in microcrystalline (cryptocrystalline) form as flint, agate, and chalcedony. Combines with water to form opal.
All forms of quartz are harder than glass.
Photographed by Michael P. Klimetz
Quartz

Huaron
PERU
Nova Scotia
CANADA
Photographed by Michael P. Klimetz
Photographed by Michael P. Klimetz

Citrine
[Conchoidially Fratured and Transparent Mass]

Aracuai

Minas Gerais
BRAZIL
Photographed by Michael P. Klimetz

Citrine
[Conchoidially Fratured and Transparent Mass]

Aracuai

Minas Gerais
BRAZIL
Photographed by Michael P. Klimetz

Citrine
[Conchoidially Fratured and Transparent Mass]

Aracuai

Minas Gerais
BRAZIL
Photographed by Michael P. Klimetz

Citrine
[Conchoidially Fratured and Transparent Mass]

Aracuai

Minas Gerais
BRAZIL
Photographed by Michael P. Klimetz

Citrine
[Conchoidially Fratured and Transparent Mass]

Aracuai

Minas Gerais
BRAZIL
Photographed by Michael P. Klimetz

Chalcedony
[Conchoidial Translucent Plate]

Ngabu

Chiwawy-Nsanje District
MALAWI
Photographed by Michael P. Klimetz

Chalcedony
[Conchoidial Translucent Plate]

Ngabu

Chiwawy-Nsanje District
MALAWI
Photographed by Michael P. Klimetz

Milky Quartz 
[Crystal Aggregate in Crevice]

Manhan Mines
Easthampton

Hampshire County
MASSACHUSETTS
Photographed by Michael P. Klimetz

Milky Quartz 
[Crystal Aggregate in Crevice]

Manhan Mines
Easthampton

Hampshire County
MASSACHUSETTS
Photographed by Michael P. Klimetz

Milky Quartz 
[Crystal Aggregate in Crevice]

Manhan Mines
Easthampton

Hampshire County
MASSACHUSETTS
Photographed by Michael P. Klimetz

Milky Quartz 
[Crystal Aggregate in Crevice]

Manhan Mines
Easthampton

Hampshire County
MASSACHUSETTS
Photographed by Michael P. Klimetz

Milky Quartz 
[Crystal Aggregate in Crevice]

Manhan Mines
Easthampton

Hampshire County
MASSACHUSETTS
Photographed by Michael P. Klimetz

Milky Quartz 
[Crystal Aggregate in Crevice]

Manhan Mines
Easthampton

Hampshire County
MASSACHUSETTS
Photographed by Michael P. Klimetz

Milky Quartz 
[Crystal Aggregate in Crevice]

Manhan Mines
Easthampton

Hampshire County
MASSACHUSETTS
Photographed by Michael P. Klimetz

Milky Quartz 
[Crystal Aggregate in Crevice]

Manhan Mines
Easthampton

Hampshire County
MASSACHUSETTS
Photographed by Michael P. Klimetz

Milky Quartz 
[Crystal Aggregate in Crevice]

Manhan Mines
Easthampton

Hampshire County
MASSACHUSETTS
Photographed by Michael P. Klimetz

Milky Quartz 
[Crystal Aggregate in Crevice]

Manhan Mines
Easthampton

Hampshire County
MASSACHUSETTS
Photographed by Michael P. Klimetz

Milky Quartz 
[Crystal Aggregate in Crevice]

Manhan Mines
Easthampton

Hampshire County
MASSACHUSETTS
Photographed by Michael P. Klimetz

High [Beta] Quartz 
[Crystal Pseudomorphs]

Bellerberg
Ettringen

Eifel
GERMANY
Photographed by Michael P. Klimetz

High [Beta] Quartz 
[Crystal Pseudomorphs]

Bellerberg
Ettringen

Eifel
GERMANY
Photographed by Michael P. Klimetz

High [Beta] Quartz 
[Crystal Pseudomorphs]

Bellerberg
Ettringen

Eifel
GERMANY
Photographed by Michael P. Klimetz

High [Beta] Quartz 
[Crystal Pseudomorphs]

Bellerberg
Ettringen

Eifel
GERMANY
Photographed by Michael P. Klimetz

Amethyst
[Compound Crystal]

Irai
Rio Grande do Sul

BRAZIL
Photographed by Michael P. Klimetz

Amethyst
[Compound Crystal]

Irai
Rio Grande do Sul

BRAZIL
Photographed by Michael P. Klimetz

Amethyst
[Compound Crystal]

Irai
Rio Grande do Sul

BRAZIL
Photographed by Michael P. Klimetz

Amethyst
[Compound Crystal]

Irai
Rio Grande do Sul

BRAZIL
Photographed by Michael P. Klimetz

Amethyst
[Partially Iron Oxide-Coated Crystal Cluster]

Thunder Bay District

Ontario
CANADA
Photographed by Michael P. Klimetz

Amethyst
[Partially Iron Oxide-Coated Crystal Cluster]

Thunder Bay District

Ontario
CANADA
Photographed by Michael P. Klimetz

Amethyst
[Partially Iron Oxide-Coated Crystal Cluster]

Thunder Bay District

Ontario
CANADA
Photographed by Michael P. Klimetz

Amethyst
[Partially Iron Oxide-Coated Crystal Cluster]

Thunder Bay District

Ontario
CANADA
Photographed by Michael P. Klimetz

Amethyst
[Partially Iron Oxide-Coated Crystal Cluster]

Thunder Bay District

Ontario
CANADA
Photographed by Michael P. Klimetz

Milky Quartz
[Crystals on Massive]

Thunder Bay District

Ontario
CANADA
Photographed by Michael P. Klimetz

Agate
[Polished Slice]

Salto do Jacui

Rio Grande do Sul
BRAZIL
Photographed by Michael P. Klimetz

Agate
[Polished Slice]

Salto do Jacui

Rio Grande do Sul
BRAZIL
Photographed by Michael P. Klimetz

Agate
[Polished Slice]

Salto do Jacui

Rio Grande do Sul
BRAZIL
Photographed by Michael P. Klimetz

Agate
[Polished Slice]

Salto do Jacui

Rio Grande do Sul
BRAZIL
Photographed by Michael P. Klimetz

Milky Quartz
[Massive with Blue Indicolite Fragments]

Santa Rosa Mine
Itambacuri

Rio Grande do Sul
BRAZIL
Photographed by Michael P. Klimetz

Plum Agate
[Cut Chalcedony Nodule]

Graveyard Point

Owyhee County
IDAHO
Photographed by Michael P. Klimetz

Plum Agate
[Cut Chalcedony Nodule]

Graveyard Point

Owyhee County
IDAHO
Photographed by Michael P. Klimetz

Plum Agate
[Cut Chalcedony Nodule]

Graveyard Point

Owyhee County
IDAHO
Photographed by Michael P. Klimetz

Plum Agate
[Cut Chalcedony Nodule]

Graveyard Point

Owyhee County
IDAHO
Photographed by Michael P. Klimetz

Plum Agate
[Cut Chalcedony Nodule]

Graveyard Point

Owyhee County
IDAHO
Photographed by Michael P. Klimetz

Plum Agate
[Cut Chalcedony Nodule]

Graveyard Point

Owyhee County
IDAHO
Photographed by Michael P. Klimetz

Smoky Quartz
[Intergrown Crystalline Mass with Schorl and Feldspar]

Slocum Quarry
East Hampton

Middlesex County
CONNECTICUT
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