• About us
  • Learn About Gems
    • Why Collect Gemstones?
    • How To Collect Gems for Fun and Profit
    • The Most Widely Traded Gemstones
    • How Gemstones and Diamonds are Graded
      • Understanding the AGL Prestige Gemstone Report
      • Understanding the AGL Colored Stone Grading Report
      • Understanding the GIA Diamond Grading Report
    • Gemstone Price Trends
    • Gemstone Price Indices
    • Gemstone Books
  • Precious Gems For Sale
    • Alexandrite - Brazilian
      • 1.10 Brazil Alexandrite No Treatment
    • Demantoid - Russian
      • 1.39 Russian Demantoid No Treatment
    • Diamonds-colored
      • 0.12 Natural Fancy Intense Green
      • 0.17 Natural Fancy Gray-Blue Diamond
      • 0.22 Natural Fancy Vivid Purplish Pink Diamond
      • 0.55 Natural Fancy Green-Yellow Diamond
      • 1.35 Natural Fancy Deep Orangy Brown Diamond
    • Emerald - Colombian
      • 1.60 Colombian Emerald
      • 4.19 Colombian Emerald
    • Garnet - Color Change
      • 7.76 Oval "Color Shift" Madagascar Garnet
    • Morganite
      • 12.94 Oval Morganite
    • Ruby - Burma
      • 1.33 "Classic" Mogok Unheated Burma Ruby
      • 1.41 Cushion Heated Mong Hsu Burma Ruby
      • 2.00 "Classic" Mogok Unheated Burma Ruby
      • 2.02 "Classic" Mogok No Heat Burma Ruby
      • 2.08 Cushion Unheated Burma Ruby
      • 2.14 "Classic" Mogok Unheated Burma Ruby
      • 3.01 "Classic" Mogok Unheated Burma Ruby
      • 3.21 Oval Star "Classic Mogok" Burma Ruby
    • Sapphire - Burma Pastel
      • 1.69 Round Unheated Light Yellow Burma Sapphire
      • 1.78 Round Unheated Fancy Light Greenish Blue Burma Sapphire
    • Sapphire - Pink
      • 1.50 Round "Classic" Unheated Mogok Burma Pink Sapphire
      • 3.15 Oval Purplish Pink Unheated Natural Sapphire
    • Sapphire - Burma Yellow
      • 4.00 Unheated Burma Yellow Sapphire Parcel
      • 7.67 Oval Unheated Yellow Burma Sapphire
      • 11.39 Unheated Burma Yellow Sapphire
    • Sapphire - Ceylon Padparadschah
      • 1.83 Oval Unheated Ceylon Padparadschah Sapphire
    • Sapphire - Kashmir, Burma and Ceylon Blue
      • 1.04 Cushion Unheated Burma Sapphire
      • 1.19 Oval Unheated "Classic Burma" Sapphire
      • 1.22 Cushion Unheated Burma Sapphire
      • 1.26 Heated Ceylon Sapphire
      • 2.39 Oval "Classic" Mogok Unheated Burma Sapphire
      • 3.11 Cushion Unheated Burma Sapphire
      • 3.19 "Classic" Mogok Unheated Burma Sapphire
      • 9.59 Oval Unheated "Classic" Mogok Burma Sapphire
      • 10.40 Oval Star Burma Sapphire
    • Spinel - Burma and Ceylon
      • 1.15 Unenhanced Oval Burma Spinel
      • 1.23 Unenhanced Oval Burma Spinel
      • 2.01 Oval Pink Spinel
      • 2.56 No Treatment Spinel
      • 3.05 Unenhanced Oval Spinel
      • 3.42 Unenhanced Square Antique Spinel
      • 5.25 Unenhanced Oval Purple Spinel
      • 10.96 Oval Ceylon "Color Change" Spinel
  • Blog
  • Newsletter
  • Contact Us
  • About us
  • Learn About Gems
    • Why Collect Gemstones?
    • How To Collect Gems for Fun and Profit
    • The Most Widely Traded Gemstones
    • How Gemstones and Diamonds are Graded
      • Understanding the AGL Prestige Gemstone Report
      • Understanding the AGL Colored Stone Grading Report
      • Understanding the GIA Diamond Grading Report
    • Gemstone Price Trends
    • Gemstone Price Indices
    • Gemstone Books
  • Precious Gems For Sale
    • Alexandrite - Brazilian
      • 1.10 Brazil Alexandrite No Treatment
    • Demantoid - Russian
      • 1.39 Russian Demantoid No Treatment
    • Diamonds-colored
      • 0.12 Natural Fancy Intense Green
      • 0.17 Natural Fancy Gray-Blue Diamond
      • 0.22 Natural Fancy Vivid Purplish Pink Diamond
      • 0.55 Natural Fancy Green-Yellow Diamond
      • 1.35 Natural Fancy Deep Orangy Brown Diamond
    • Emerald - Colombian
      • 1.60 Colombian Emerald
      • 4.19 Colombian Emerald
    • Garnet - Color Change
      • 7.76 Oval "Color Shift" Madagascar Garnet
    • Morganite
      • 12.94 Oval Morganite
    • Ruby - Burma
      • 1.33 "Classic" Mogok Unheated Burma Ruby
      • 1.41 Cushion Heated Mong Hsu Burma Ruby
      • 2.00 "Classic" Mogok Unheated Burma Ruby
      • 2.02 "Classic" Mogok No Heat Burma Ruby
      • 2.08 Cushion Unheated Burma Ruby
      • 2.14 "Classic" Mogok Unheated Burma Ruby
      • 3.01 "Classic" Mogok Unheated Burma Ruby
      • 3.21 Oval Star "Classic Mogok" Burma Ruby
    • Sapphire - Burma Pastel
      • 1.69 Round Unheated Light Yellow Burma Sapphire
      • 1.78 Round Unheated Fancy Light Greenish Blue Burma Sapphire
    • Sapphire - Pink
      • 1.50 Round "Classic" Unheated Mogok Burma Pink Sapphire
      • 3.15 Oval Purplish Pink Unheated Natural Sapphire
    • Sapphire - Burma Yellow
      • 4.00 Unheated Burma Yellow Sapphire Parcel
      • 7.67 Oval Unheated Yellow Burma Sapphire
      • 11.39 Unheated Burma Yellow Sapphire
    • Sapphire - Ceylon Padparadschah
      • 1.83 Oval Unheated Ceylon Padparadschah Sapphire
    • Sapphire - Kashmir, Burma and Ceylon Blue
      • 1.04 Cushion Unheated Burma Sapphire
      • 1.19 Oval Unheated "Classic Burma" Sapphire
      • 1.22 Cushion Unheated Burma Sapphire
      • 1.26 Heated Ceylon Sapphire
      • 2.39 Oval "Classic" Mogok Unheated Burma Sapphire
      • 3.11 Cushion Unheated Burma Sapphire
      • 3.19 "Classic" Mogok Unheated Burma Sapphire
      • 9.59 Oval Unheated "Classic" Mogok Burma Sapphire
      • 10.40 Oval Star Burma Sapphire
    • Spinel - Burma and Ceylon
      • 1.15 Unenhanced Oval Burma Spinel
      • 1.23 Unenhanced Oval Burma Spinel
      • 2.01 Oval Pink Spinel
      • 2.56 No Treatment Spinel
      • 3.05 Unenhanced Oval Spinel
      • 3.42 Unenhanced Square Antique Spinel
      • 5.25 Unenhanced Oval Purple Spinel
      • 10.96 Oval Ceylon "Color Change" Spinel
  • Blog
  • Newsletter
  • Contact Us

Learn About Gems

Are you starting or adding to your portfolio? Learn about collecting gemstones for both fun & profit!

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Precious Gemstones For Sale

We have a fantastic inventory of precious gemstones available for sale. Add to your collection today!

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Contact Us

Have questions? Do you want to discuss your portfolio? Contact us today!

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ABOUT US

Dealers specializing in world class independently graded American Gemological Laboratories (AGL) Burma ruby and sapphire, Burma spinel, Colombian emerald, collector gems and Gemological Institute of America (GIA) graded fancy colored diamonds.

Robert Genis is the President of National Gemstone, which was founded in 1982 and has been on the net since 1995. Robert has over 40 years experience in the field. He is frequently quoted in the national press including the Wall Street Journal and the New York Times. Robert has written numerous articles on gem collecting/investing. He is also the editor of The Gemstone Forecaster newsletter and was the colored gemstone editor for the Rapaport Diamond Report from 1997-2007.

NGC has been recognized and recommended as a reputable dealer by PreciouStones Newsletter, The Gem Market Reporter, Wealth, Personal Finance Newsletter, The Retirement Letter and The Dow Jones-Irwin Guide to Fine Gems and Jewelry.

 

contact us

P.O. Box 42468
Tucson, AZ USA 85733
 

1-800-458-6453
1-520-577-6222 
 

rgenis@preciousgemstones.com
 

© 2021 National Gemstone  - All rights reserved. Reproduction in any form, without prior permission, is expressly prohibited.