Lotus Gemology

  • Discovery of Rutile Silk in Sapphire in 1878

    Discovery of rutile silk in sapphire

    In 1878, the noted Austrian mineralogist, Gustav Tschermak von Seysenegg [1836–1927], was the first to properly identify silk in corundum, finding it to be composed of the mineral rutile (TiO2). An English translation of his landmark paper is included, along with the original German version.

  • From Peacock to Pigeon's Blood • Lotus Gemology Color Types

    From Peacock to Pigeon's Blood: Deconstructing Lotus Color Types

    A brief description of the color types for ruby and sapphire used at Lotus Gemology.

  • Lotus Gemology Lab Alert for Oiled Gems

    Lotus Gemology warns that oiled rubies, sapphires and spinels are entering the Bangkok wholesale market in increasing numbers. Most, but not all, of these gems are originating from Burma.

  • Lotus Gemology Price List


  • Making Gemology Great Again Hat • Order Page • Lotus Gemology


    Introducing the Lotus Hat. It's tremendous.

    Perfect for keeping the sun off your face when you're visiting mines and markets, and a great accessory in the city.

    Front reads "LOTUS gemology"
    Back reads "making GEM • ology great again"

    Hat is made of cotton and is adjustable in the back.

    $30 per hat, including international shipping & handling from Thailand
    Ships via International Parcel Air (2-3 weeks)

    *Please note that any customs duties/fees in the recipient's country are not included and are the responsibility of the recipient*

    Once you click the "Add to Cart" button below, you can select the quantity on the next page.

    Order Here (Now Shipping)


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