Cushion

Your gemstone search

Showing 33–48 of 63 results

  • Pink sapphire

    Pink sapphire

    1,552 ct. | V/C
    GLA
    €1,500.00
  • Purple Sapphire

    Purple Sapphire

    2,254 ct. | IV/D
    GLA
    €1,200.00
  • Purple sapphire

    Purple sapphire

    1,697 ct. | V/D
    GLA
    €1,400.00
  • Purple sapphire

    Purple sapphire

    1,954 ct. | V/D
    GLA
    €1,600.00
  • Rubellite

    Rubellite

    2,518 ct. | II/C
    GLA
    €650.00
  • Rubellite

    Rubellite

    2,568 ct. | III/C
    GLA
    €500.00
  • Rubellite

    Rubellite

    2,668 ct. | III/C
    GLA
    €650.00
  • Rubellite

    Rubellite

    3,332 ct. | III/D
    GLA
    €1,200.00
  • Ruby

    Ruby

    2,028 ct. | V/C
    63663-1
    €13,000.00
  • Sapphire

    Sapphire

    1,167 ct. | V/C
    GLA
    €1,600.00
  • Sapphire

    Sapphire

    7,982 ct. | V/D
    GLA
    €34,000.00
  • Sapphire - reddish brown

    Sapphire - reddish brown

    1,014 ct. | V/C
    GLA
    €600.00
  • Spessartin

    Spessartin

    18,028 ct. | VI/A
    GLA
    €4,800.00
  • Spessartite

    Spessartite

    5,514 ct. | IV/B
    GLA
    €1,900.00
  • Spessartite

    Spessartite

    6,173 ct. | V/A
    GLA
    €1,900.00
  • Tanzanite

    Tanzanite

    14,1 ct. | II/B
    GLA
    €13,600.00

Facts

properties of tanzanite

  • Belongs mineralogically to zoisite
  • Hardness grade 6,5-7
  • Chemical formula: Ca2Al3(SiO4)3OH
  • Includes the colors blue, violet and brown
  • By heating it develops its famous blue color
  • Density from 3,29 - 3,4

origin

worth knowing

  • Only place of discovery: Tanzania
  • Tanzania locality was discovered in 1967
  • Was mineralogically known as "Zoisite" for a long time
  • Became known worldwide through the movie "Titanic"

Tanzanite as an investment

  • Rare, strongly increasing in value
  • finds become less, because there is only 1 mining area
  • rather bigger stones are preferable
  • Larger stones have higher increase in value
  • stones with deep blue color are to be preferred
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