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THE MINERAL TOPAZ

  • Chemistry: Al 2 SiO 4 (F, OH) 3, Aluminum silicate fluoride hydroxide.
  • Class: Silicates
  • Subclass: Nesosilicates
  • Uses: gemstones and optical properties are useful in industry.
  • For natural topaz mineral specimens see our For Sale or Sold lists
    For Topaz Jewelry, see -->  TOPAZ JEWELRY

Topaz is a common gemstone that has been used for centuries in jewelry. Its golden brown to yellow color is classic but is confused with the less valuable citrine, which is sometimes sold under the name topaz. The blue topaz that is often confused with aquamarine is rarely natural and is produced by irradiating and then heating clear crystals. Golden Topaz is the November Birthstone, and Blue Topaz is an acceptable alternate birthstone for December.

The structure of Topaz is controlled by a chain like structure of connected irregular octahedrons. These octahedrons have an aluminum in the middle surrounded by four oxygens. Above and below the aluminum are the hydroxide or fluoride ions. The chains of octahedrons are held together by individual silicate tetrahedrons but it is the octahedron chains that give topaz its crystalline shape.

Topaz is the hardest silicate mineral and one of the hardest minerals in nature. However it has a perfect cleavage which is perpendicular to the chains and is caused by planes that break the weaker Al-O, Al-OH and Al-F bonds. None of the stronger Si-O bonds cross these planes.

Topaz crystals can reach the incredible size of several hundred pounds. Topaz can make very attractive mineral specimens due to their high luster, nice colors and well formed and multifaceted crystals.

PHYSICAL CHARACTERISTICS:

  • Color is clear, yellow, orange, red, blue and green.
  • Luster is adamantine to vitreous.
  • Transparency crystals are transparent to translucent.
  • Crystal System is orthorhombic; 2/m 2/m 2/m
  • Crystal Habits include a prismatic crystal with usually two different prisms that produce a rounded or sharp diamond-shaped cross-section. The termination is typically capped by a dome forming a roof like top. Another dome can modify the termination producing a point at the juncture of the two domes. A basal pinacoid can flatten the prisms termination or truncate the top of the domes. The pinacoid, multiple domes and occasionally orthorhombic pyramid faces can produce a complex, multifaceted and well formed termination. Topaz can be granular and massive.
  • Cleavage is perfect in one direction, basal.
  • Fracture is conchoidal.
  • Hardness is 8.
  • Specific Gravity is approximately 3.4 - 3.5+ (above average)
  • Streak is white.
  • Associated Minerals include quartz, tourmalines, micas, brookite, cassiterite and fluorite.
  • Other Characteristics: index of refraction is 1.61 - 1.64. Prism faces maybe striated lengthwise.
  • Notable Occurrences include Minas Gerias, Brazil; Pakistan; San Diego Co, California; Ural Mountains, Russia; Mexico and the Thomas Range, Utah.
  • Best Field Indicators are crystal habit, color, density and hardness.
Topaz Jewelry - Hover over an item for more information
Stella Mini Lollipop Ring in Blue Topaz Doublet with Diamonds, 0.15 - Ippolita
From the Rock Candy Collection. Signature Ippolita hand-hammered sterling silver. Round-cut clear quartz and blue topaz doublet center. Pave diamond halo. H-I/SI-2 diamonds, 0.15 total carat weight. Face, 14mm (approx. 1/2in). US ring size 7. Imported.Only $650.00 at Neiman Marcus
no photoStella Mini Lollipop Ring in Blue Topaz Doublet with Diamonds, 0.15 - Ippolita
$650.00
Neiman Marcus
Naga Batu Ring, White Topaz - John Hardy
Naga means dragon in Balinese and is a symbol of health and prosperity. With intricate dragon detailing and a light-lauding white topaz center, who knows what will come your way when you wear this John Hardy ring? From the Naga Collection. Sterling...Only $995.00 at Neiman Marcus
no photoNaga Batu Ring, White Topaz - John Hardy
$995.00
Neiman Marcus
Ross-Simons Blue Topaz Pendant Necklace, Diamonds in 14kt Yellow Gold. 16"
Update any ensemble with this eye-catching and elegant blue topaz pendant necklace. Filigree design is accented with diamonds. Textured and polished 14kt yellow gold necklace. Blue Topaz birthstones are the perfect gift for December birthdays.Only $746.25 at Ross-Simons
no photoRoss-Simons Blue Topaz Pendant Necklace, Diamonds in 14kt Yellow Gold. 16"
$746.25
Ross-Simons
Ross-Simons 9.23 ct. t.w. London Blue Topaz Bracelet in Sterling Silver. 7"
Wrap your wrist in luxe glamour with 9.23 ct. t.w. London blue topaz. Polished sterling silver bracelet. Blue Topaz birthstones are the perfect gift for December birthdays.Only $281.25 at Ross-Simons
no photoRoss-Simons 9.23 ct. t.w. London Blue Topaz Bracelet in Sterling Silver. 7"
$281.25
Ross-Simons
6.50 carat Pear Cut Blue Genuine Topaz Sterling Silver Slide Pendant
Rated by 25,000+ Customers. 6.50 TCW Pear Cut Blue Genuine Topaz Sterling Silver Slide PendantOnly $56.99 at PalmBeachJewelry
no photo6.50 carat Pear Cut Blue Genuine Topaz Sterling Silver Slide Pendant
$56.99
PalmBeachJewelry
5.55 CT TW Blue Topaz and London Blue Topaz Ring in Sterling Silver, Size 6,7,9, Size 6,7,9
Rated by 25,000+ Customers. 5.55 CT TW Blue Topaz and London Blue Topaz Ring in Sterling SilverOnly $132.99 at PalmBeachJewelry
no photo5.55 CT TW Blue Topaz and London Blue Topaz Ring in Sterling Silver, Size 6,7,9, Size 6,7,9
$132.99
PalmBeachJewelry
Windrose Pave White Topaz Ring - Elizabeth and James
Elizabeth and James X ring. Pave white topaz. 25% silver alloy, 1 micron of 24-karat yellow gold plate. 4/5in diameter. Imported.Only $150.00 at Neiman Marcus
no photoWindrose Pave White Topaz Ring - Elizabeth and James
$150.00
Neiman Marcus
Ross-Simons 2.30ct t.w. White Topaz Five-Stone Ring in Platinum Over Silver
Get the look of diamonds for less! This five-stone ring features 2.30 ct. t.w. white topaz rounds shimmering in a platinum over sterling silver setting. Platinum over sterling silver ring.Only $80.00 at Ross-Simons
no photoRoss-Simons 2.30ct t.w. White Topaz Five-Stone Ring in Platinum Over Silver
$80.00
Ross-Simons
2.50-Carat Round Genuine Topaz 10k Yellow Gold Solitaire Bridal Engagement Ring, Size 10,6,7,8,9, Size 10,6,7,8,9
Rated by 25,000+ Customers. 2.50-Carat Round Genuine Topaz 10k Yellow Gold Solitaire Bridal Engagement RingOnly $189.99 at PalmBeachJewelry
no photo2.50-Carat Round Genuine Topaz 10k Yellow Gold Solitaire Bridal Engagement Ring, Size 10,6,7,8,9, Size 10,6,7,8,9
$189.99
PalmBeachJewelry
Cultured Freshwater Biwa Pearl with White Topaz Accents Sterling Silver Ring, Size 10,5,6,7,8,9, Size 10,5,6,7,8,9
Rated by 25,000+ Customers. Cultured Freshwater Biwa Pearl with White Topaz Accents Sterling Silver RingOnly $75.99 at PalmBeachJewelry
no photoCultured Freshwater Biwa Pearl with White Topaz Accents Sterling Silver Ring, Size 10,5,6,7,8,9, Size 10,5,6,7,8,9
$75.99
PalmBeachJewelry
Pave London Blue Topaz Ring - Konstantino
Make an impression with light-lauding London blue topaz. Regal, yet modern, this intricately carved Konstantino ring offers a decadent, dazzling take on evening event adornment. Oval-cut London blue topaz center and round-cut, prong-set pave details....Only $850.00 at Neiman Marcus
no photoPave London Blue Topaz Ring - Konstantino
$850.00
Neiman Marcus
Ross-Simons 1.87 ct. t.w. Blue Topaz Station Necklace in Sterling Silver
This necklace will bring a soft, icy hue to your ensemble, with 1.87 ct. t.w. of round bezel-set blue topaz stationed along a cable chain. Springring clasp, sterling silver necklace. Blue Topaz birthstones are the perfect gift for December birthdays.Only $75.00 at Ross-Simons
no photoRoss-Simons 1.87 ct. t.w. Blue Topaz Station Necklace in Sterling Silver
$75.00
Ross-Simons
David Yurman 'Renaissance' Bracelet with Semiprecious Stones
Sterling silver and 18-karat yellow gold. Faceted citrine, iolite or amethyst. Cabochon pink tourmaline, green onyx or green tourmaline. Cable, 4mm wide. By David Yurman; imported. Color(s): amethyst, amethyst/ pink tourmaline, blue topaz, citrine,...Only $595.00 at Nordstrom
no photoDavid Yurman 'Renaissance' Bracelet with Semiprecious Stones
$595.00
Nordstrom
White Topaz Celestial Bangle - Elizabeth and James
Elizabeth and James celestial bracelet. 25% silver alloy, 1 micron of 24 karat yellow gold plate. Split star end caps with white pave topaz. Opening for slip-on style. Oval; 6 1/2in inside circumference includes opening. 3/4inW at widest.Only $225.00 at Neiman Marcus
no photoWhite Topaz Celestial Bangle - Elizabeth and James
$225.00
Neiman Marcus
"14K Yellow Gold 10 x 10mm triangle cut Multicolor Mystic Topaz Quartz Pendant Earrings and Ring Jewe"
"Enjoy the mysterious and glittering beauty of˙triangle˙cut˙Multicolor Mystic Topaz˙quartz gems. These classic elegant three piece˙pink stones are full-cut and set in warm 14K yellow gold. Perfectly matching, the jewelry set features wire back...Only $578.00 at Sarraf Jewelry
no photo"14K Yellow Gold 10 x 10mm triangle cut Multicolor Mystic Topaz Quartz Pendant Earrings and Ring Jewe"
$578.00
Sarraf Jewelry
 

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