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1.78ct Violet Blue Tanzanite

1.78 ct total Natural Violet Blue Tanzanite
Tanzanite from The Source Tanzanite from The Source Tanzanite from The Source Click to Enlarge

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Type: Tanzanite
Item ID: 310733
Content: 6 gems
Weight: 1.78 ct total
Size: 4.52 x 4.42 x 2.60mm (avg.)
Shape: Trillion Facet
Clarity: VVS-VS
Treatment: Heated
Origin: Tanzania
Price in USD:
$64.08
Shipping and HandlingShipping & Handling USD 6.99
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Add matching ItemsAdd Matching or Similar Items (13)
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Compare 13 Similar or Matching Items! Back To Top
ID: 2385956 pcs
Tanzanite Gemstone
1.86ctw Tanzanite
4.51 x 4.49 x 2.50mm
US $66.96
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ID: 3096576 pcs
Tanzanite Gemstone
1.76ctw Tanzanite
4.60 x 4.46 x 2.32mm
US $63.36
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ID: 3096586 pcs
Tanzanite Gemstone
1.72ctw Tanzanite
4.49 x 4.45 x 2.23mm
US $61.92
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ID: 3096596 pcs
Tanzanite Gemstone
1.61ctw Tanzanite
4.63 x 4.56 x 2.10mm
US $57.96
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ID: 3096606 pcs
Tanzanite Gemstone
1.64ctw Tanzanite
4.49 x 4.43 x 2.20mm
US $59.04
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ID: 3096616 pcs
Tanzanite Gemstone
1.71ctw Tanzanite
4.49 x 4.43 x 2.08mm
US $61.56
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ID: 3096666 pcs
Tanzanite Gemstone
1.93ctw Tanzanite
4.61 x 4.56 x 2.40mm
US $69.48
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ID: 3107256 pcs
Tanzanite Gemstone
1.83ctw Tanzanite
4.61 x 4.51 x 2.37mm
US $65.88
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ID: 3107266 pcs
Tanzanite Gemstone
1.94ctw Tanzanite
4.56 x 4.48 x 2.35mm
US $69.84
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ID: 3107276 pcs
Tanzanite Gemstone
1.94ctw Tanzanite
4.59 x 4.52 x 2.55mm
US $69.84
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ID: 3107356 pcs
Tanzanite Gemstone
1.96ctw Tanzanite
4.63 x 4.55 x 2.55mm
US $70.56
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ID: 3508176 pcs
Tanzanite Gemstone
1.91ctw Tanzanite
4.52 x 4.44 x 2.72mm
US $68.76
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ID: 3508226 pcs
Tanzanite Gemstone
1.86ctw Tanzanite
4.52 x 4.42 x 2.62mm
US $66.96
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Shipping Back To Top
  • FedEx or DHL for $20.00 only / Delivery 3-4 days / fully insured
  • Registered Mail for $6.99 / Delivery 7-14 days / insured for $200.00
Payment Options
  • Credit Card
  • PayPal
  • Western Union
  • Bank transfer
Guarantee / Certification
  • All gemstones are natural!
  • All photos and videos are of the actual gem for sale (No Stock Photos)
  • We offer certification from AIGS for $20.00 only (3-5 additional days)
Size and Weight Back To Top
  • Gems are always measured in Millimeter (mm)
    Compare mm Size with US coins
  • Dimensions are given as length x width x depth, except for round stones which are diameter x depth
  • Select gems by size, not by weight! Gem varieties vary in density, so carat weight is not a good indication of size
  • Note: 1ct = 0.2g
Additional Quantities
  • Every item is unique, so you can only order 1 of each item
  • However, we often have similar or matching items. If so, we display them on the same gem detail page
Clarity Explained Back To Top
  • IF = Loupe Clean - Internally flawless; free of inclusions
  • VVS = Almost Loupe Clean - Very, very slight inclusions; inclusions barely seen under 10x magnification
  • VS = Eye Clean - Very slight inclusions; inclusions can be seen under 10x magnification
  • SI = Slightly included - Small inclusions can be seen with the naked eye
  • I1 = Included - Inclusions can be seen with the naked eye
  • Transparent = A gemstone having the property of transmitting light without serious diffusion / may have rutile or other inclusions
  • Translucent = Allowing light to pass through, but not transparent
  • Opaque = Does not allow light to pass through
Return Policy
  • All gems have a 30-day inspection period, which begins on the date of delivery. Gems may be returned for a full refund during this period.
  • Please email us for return authorization code when returning a gem.
  • For more details click here
Treatment Back To Top
 
Heated:
Heating a gemstone to high temperatures sometimes improves the color and clarity. This treatment is common for sapphire, ruby, tanzanite, apatite and blue zircon. More about treatments
About Tanzanite
Discovered only in 1967 in Tanzania, this lovely gem has been a worldwide success, and demand continues to exceed supply. Tanzanite is a variety of zoisite, which is a member of the epidote group. Colors range from blue to purple to green. The most highly coveted color is the deep blue which shows a purple hue shimmering around it.

Tanzanite is trichroic and exhibits pronounced pleochroism. The colors respective to the three vibrational directions are sapphire-blue, sage green, and purple. Orientation is an important consideration for cutters who need to consider both the yield and the resulting color.
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