THE MINERAL LAZURITE


Lazurite is a popular but generally expensive mineral. Well-formed, deep blue crystals are rare and valuable. It is more commonly found massive and combined with other minerals into a rock called Lapis Lazuli, which is an alternate birthstone for the month of September.

Lapis lazuli (often simply called lapis) is mostly lazurite but commonly contains pyrite and calcite and some other minerals. The name means "blue rock" and is always a brilliant blue with violet or greenish tints. The rich blue color is due to the sulfur that is inherent in the structure of lazurite. Small crystals of pyrite are always present in lapis and their brassy yellow color is both attractive and diagnostic in distinguishing lapis from its also blue cousin - sodalite rock, which lacks pyrite. The calcite produces white streaks in the lapis and too much calcite will lower the value of the stone.

Lapis lazuli has been mined for centuries from a locality still in use today in the remote mountain valley called Kokcha, Afghanistan. First mined 6000 years ago, the rock was transported to Egypt and present day Iraq and later to Europe where it was used in jewelry and for ornamental stone. Europeans even ground down the rock into an expensive powdered pigment for paints called "ultramarine". Today ultramarine is manufactured artificially. Although no longer the only source of lapis, Afghanistan still produces the finest quality material.

Lazurite is a member of the feldspathoid group of minerals. Minerals whose chemistries are close to that of the alkali feldspars but are poor in silica (SiO2) content are called feldspathoids. As a result - or more correctly as a function - of that fact, they are found in silica poor rocks containing other silica poor minerals and no quartz. If quartz were present when the melt was crystallizing, it would react with any feldspathoids and form a feldspar. Localities that have feldspathoids are few.

The name lazurite is often confused with the bright blue phosphate mineral lazulite. However the two minerals can not be confused with each other identification wise because of lazulite's typical vitreous luster and good crystal habit. The carbonate mineral azurite has a very similar color to lazurite but is associated with the green carbonate mineral malachite and reacts to acids.

PHYSICAL CHARACTERISTICS:

  • Color is brilliant blue with violet or greenish tints.
  • Luster is dull to greasy.
  • Transparency: Crystals are translucent to opaque.
  • Crystal System: Isometric; bar 4 3/m
  • Crystal Habits: Dodecahedral crystals have been found, usually massive as a rock (lapis lazuli) forming mineral.
  • Cleavage is poor, in six directions, but rarely seen.
  • Fracture is uneven
  • Hardness is 5 - 5.5
  • Specific Gravity is 2.3 - 2.4 (somewhat below average)
  • Streak is bright blue.
  • Other Characteristics: Index of refraction is 1.5.
  • Associated Minerals calcite, some pyroxenes and most diagnostic pyrite.
  • Notable Occurrences include Kokcha River valley, Afghanistan; Ovalle, Cordillera, Chile; near Lake Baikal, Russia; Mt. Vesuvius, Italy; Cascade Canyon, San Bernardino Mountains and Ontario Peak, California and in the Sawatch Mountains, Colorado, USA.
  • Best Field Indicators are the violet-blue color, pyrite association (unlike sodalite), locality and specific gravity.

Lapis Jewelry - Hover over an item for more information
Temple Tiered Triangle Pendant Necklace - House of Harlow
Golden tiered necklace with triangular pendants. Faceted lapis and turquoise veined crystals. Lobster clasp with small logo charm.Only $58.00 at Neiman Marcus
no photoTemple Tiered Triangle Pendant Necklace - House of Harlow
$58.00
Neiman Marcus
14mm Sterling Silver Lapis Rocks Clip-On Earrings - Lagos
Lagos stud earrings. Faceted cushion-cut lapis. Sterling silver signature Caviar bezels. Omega post backs for pierced ears.Only $450.00 at Neiman Marcus
no photo14mm Sterling Silver Lapis Rocks Clip-On Earrings - Lagos
$450.00
Neiman Marcus
Short Dotted Beaded Tassel Clip-On Earrings, Lapis Blue - Oscar de la Renta
Dotted faceted seed beads. Tassel drops. Clip backs finished with comfort padding. Approx. 3inL. Made in USA.Only $345.00 at Neiman Marcus
no photoShort Dotted Beaded Tassel Clip-On Earrings, Lapis Blue - Oscar de la Renta
$345.00
Neiman Marcus
Five-Piece Lapis/Brass Bracelet Set - Nest
Five-piece set includes two matte lapis bracelets and three African brass beaded bracelets. Elastic style fits most wrists. Made in USA of Kenyan material.Only $395.00 at Neiman Marcus
no photoFive-Piece Lapis/Brass Bracelet Set - Nest
$395.00
Neiman Marcus
Ross-Simons Lapis Teardrop Earrings, .70ct t.w. Blue Topaz in 14kt Yellow Gold
The color of the sky and sea: these earrings drop starry lapis teardrops from cool blue topaz rounds totaling .70 carats. Post/clutch, 14kt yellow gold earrings.Only $116.25 at Ross-Simons
no photoRoss-Simons Lapis Teardrop Earrings, .70ct t.w. Blue Topaz in 14kt Yellow Gold
$116.25
Ross-Simons
Sterling Silver Deep Blue Lapis Ring Jewelry
This Ring was handmade by a master artisan and is one of a kind.Only $139.49 at JeGem.com
no photoSterling Silver Deep Blue Lapis Ring Jewelry
$139.49
JeGem.com
Angani Lapis Horn Bangle - Ashley Pittman
Live in the lapis of luxury with this Ashley Pittman bangle. Designed to work as well with blue jeans as with a glamorous evening gown. Wide, polished dark horn cuff varies in coloring. Lapis and aqua crystals; 18-karat yellow gold-plated bronze...Only $885.00 at Neiman Marcus
no photoAngani Lapis Horn Bangle - Ashley Pittman
$885.00
Neiman Marcus
Sterling Silver Deep Blue Lapis Ring Jewelry
This Ring was handmade by a master artisan and is one of a kind.Only $143.24 at JeGem.com
no photoSterling Silver Deep Blue Lapis Ring Jewelry
$143.24
JeGem.com
Abra Lapis Rectangle Pendant Necklace - Lana
14-karat yellow gold. Flat link necklace. Links wrap around rectangular lapis drop. Pendant, 3/4inL x 1/2inW. Necklace, 1tL. Lobster clasp.Only $720.00 at Neiman Marcus
no photoAbra Lapis Rectangle Pendant Necklace - Lana
$720.00
Neiman Marcus
Sterling Silver Deep Blue Lapis Ring Jewelry
This Ring was handmade by a master artisan and is one of a kind.Only $88.49 at JeGem.com
no photoSterling Silver Deep Blue Lapis Ring Jewelry
$88.49
JeGem.com
Sterling Silver Deep Blue Lapis Three-Stone Ring Jewelry
This Ring was handmade by a master artisan and is one of a kind.Only $110.24 at JeGem.com
no photoSterling Silver Deep Blue Lapis Three-Stone Ring Jewelry
$110.24
JeGem.com
Rose Gold Over Sterling Silver Paved CZ, Deep Blue Lapis BOLD Ring Jewelry
This Ring was handmade by a master artisan and is one of a kind.Only $281.99 at JeGem.com
no photoRose Gold Over Sterling Silver Paved CZ, Deep Blue Lapis BOLD Ring Jewelry
$281.99
JeGem.com
Splash Lapis Hexagon Necklace - Lana
Necklace by Lana. 14-karat yellow gold. Hexagon-faceted lapis center pendant. Flat-link chain necklace, 18inL. Lobster clasp. Made in USA of Italian materials.Only $675.00 at Neiman Marcus
no photoSplash Lapis Hexagon Necklace - Lana
$675.00
Neiman Marcus
Sterling Silver Deep Blue Lapis Butterfly Ring Jewelry
This Ring was handmade by a master artisan and is one of a kind.Only $170.24 at JeGem.com
no photoSterling Silver Deep Blue Lapis Butterfly Ring Jewelry
$170.24
JeGem.com
Turquoise, Lapis Lazuli and Coral Set of Five Stackable Rings in Sterling Silver, Size 10,5,6,7,9, Size 10,5,6,7,9
Rated by 25,000+ Customers. Turquoise, Lapis Lazuli and Coral Set of Five Stackable Rings in Sterling SilverOnly $113.99 at PalmBeachJewelry
no photoTurquoise, Lapis Lazuli and Coral Set of Five Stackable Rings in Sterling Silver, Size 10,5,6,7,9, Size 10,5,6,7,9
$113.99
PalmBeachJewelry