Archive for the Synthetic Gemstones Category

  • Turquoise-Synthetic

    Refractive Index : 1.610-1.590(1.61 Spot)

    Optical Characteristic : AGG

    Specific Gravity : 2.75-2.68

    Formula : CuAI6(PO4)4(OH)8.4(H20)

    Crystal System : Triclinic

    Variety/Species : All

    Species/Group : Turquoise-Synthetic

    Birefringence : None

    Dispersion : N/A

    Hardness : 5 to 6

    Toughness : Poor to good

    Ultrasonic : Never

    Steam : Never

    UV Long : Inert to weak

    UV Short : Inert

    Pleochroism : None

    Strength : N/A

    Pleochroism Colors : None

    Heat : Avoid Heating

    Acids : [...]

  • YAG

     

    Refractive Index : 1.833 (+ 0.010 – 0.010)

    Optical Characteristic : SR

    Specific Gravity : 4.60 to 4.50

    Formula : Y3AI5O12

    Crystal System : Cubic

    Variety/Species : Yttrium Aluminum Garnet

    Species/Group : Garnet (Man-made)

    Birefringence : None

    Dispersion : 0.028

    Hardness : 8.25

    Toughness : Good

    Ultrasonic : Uaually safe

    Steam : Usually safe

    UV Long : Inert to strong

    UV Short : Inert to strong

    Pleochroism : None

    Strength : [...]