• <rt id="wzsil"></rt>
  • <cite id="wzsil"></cite>

    <tt id="wzsil"><noscript id="wzsil"></noscript></tt>
  • <rt id="wzsil"></rt>

    1. Rhodolite Value, Price, and Jewelry Information

      Fancy Brilliant Octagon Cut Rhodolite Garnet. ? Dan Stair Custom Gemstones. Used with permission.

      Rhodolite

      Rhodolite Value

      The International Gem Society (IGS) has a list of businesses offering gemstone appraisal services.

      Garnet Value via Gem Price Guide

      Almandine

      Top Color: oR, R, PR, rP 6/4
      Almandine All sizes
      to /ct

      Almandine/Pyrope Blend ("Mozambique")

      Red-Brown Colors
      "Mozambique" All sizes
      to /ct

      Rhodolite (Almandine/Pyrope Blend)

      Fine Color: rP, PR 6/5
      Rhodolite .5 to 1 carat 1 to 10 carats 10 carats plus
      Faceted to /ct to /ct to /ct
      Cabochons to /ct to /ct to /ct

      Andradite

      Fine Color: G 5/4
      Andradite All sizes
      to /ct

      Demantoid

      Demantoid to 1 carat 1 to 3 carats
      to /ct to ,000/ct

      Grossular

      Grossular .5 to 1 carat 1 to 5 carats 5 carats plus
      Mint Green (Merelani) to /ct to /ct to /ct
      Yellow/Orange to /ct to /ct to /ct
      Yellow/Green to /ct to /ct to /ct
      Other colors /ct /ct to /ct

      Hessonite

      Fine Color: yO 4/5
      Hessonite Garnet All sizes
      to /ct

      Tsavorite

      Fine Color: G 6/5
      Tsavorite .5 to 1 carat 1 to 2 carats 2 carats plus
      Faceted to /ct to /ct to ,000/ct

      Mali Garnets (Andradite/Grossular Blend)

      Mali Garnet All sizes
      to /ct

      Malaya (Malaia) Garnets

      Malaya Garnet .5 to 1 carat 1 to 5 carats 5 carats plus
      to /ct to /ct to /ct

      Pyrope

      Fine Color: R 6/5
      Pyrope 1 carat plus
      /ct

      Chrome Pyrope

      Chrome Pyrope All sizes
      to /ct

      Spessartite

      Spessartite Reds .5 to 3 carats 3 to 6 carats
      Little 3 Mine to /ct to /ct
      African to /ct to /ct
      Darker reds to /ct

      Mandarin

      Fine Color: O 4/5
      Mandarin Orange All sizes
      to /ct

      Uvarovite

      Uvarovite 10 carats plus
      Druzy to /ct

      Star Garnet

      Star Garnet All sizes
      6 ray star to /ct
      4 ray star to /ct

      Color Change

      Color Change .5 to 1 carat 1 to 6 carats
      Africa to /ct to /ct
      US to /ct to /ct

      Cabochons

      Cabochons All Sizes
      Common red to purple to /ct

      Rhodolite Information

      Data Value
      Name Rhodolite
      Is a Variety of Almandine-Pyrope
      Crystallography Isometric.
      Refractive Index 1.745-1.761
      Colors Purplish red, red-purple, reddish purple.
      Luster Vitreous.
      Hardness 7-7.5
      Fracture Conchoidal
      Specific Gravity 3.79-3.80 (Tanzania); 3.83-3.89 (Zimbabwe); 3.84-3.89 (North Carolina).
      Birefringence None.
      Cleavage None
      Dispersion 0.026
      Luminescence None.
      Luminescence Present No
      Transparency Transparent.
      Absorption Spectrum Rhodolites show an almandine spectrum. Almandines have a distinctive, diagnostic absorption spectrum: A band 200 ? wide at 5760 (strong) and also strong bands at 5260 and 5050. Lines may appear at 6170 and 4260. With a spectroscope, you’ll see this pattern of 3 (or sometimes 5) bands in all almandines as well as most garnets with a significant almandine component.
      Phenomena Color change (rare).
      Birthstone January (garnet).
      Pleochroism None.
      Optics N?= 1.750-1.760 (Zimbabwe);?1.760-1.761 (North Carolina);?1.745-1.760 (Tanzania).

      Rhodolite is intermediate in composition between almandine and pyrope, with a ratio of Al to Fe of 2 to 1 (that is, 2 pyrope + 1 almandine). The distinctiveness of rhodolite is in its color, which is nearly always a purplish red.

      The absorption spectrum always shows almandine lines. Inclusions include apatite crystals (North Carolina) and any of the other inclusions found in almandine. The color of a garnet is misleading, and a chemical analysis is required to show whether a garnet is an almandine or pyrope, or a mixed crystal.

      Optics:

      N= 1.750-1.760 (Zimbabwe);

      1.760-1.761 (North Carolina);

      1.745-1.760 (Tanzania).

      Occurrence:

      North Carolina:?rhododendron red. lilac, pinkish.

      Sri Lanka; Madagascar; India; Tanzania; Zimbabwe; Brazil.

      Stone Sizes:

      Smithsonian Institution (Washington, D.C): 74.3, 22.1 (Tanzania); 16.5 (North Carolina).

      Comments:

      The original locality for rhodolite was Cowee Creek, Macon County, North Carolina. Stones from this locality are usually very small (under 1-2 carats), but new finds in Africa have yielded gems over 75 carats. Material from the North Pare Mountains, Tanzania, may show a color change, blue in daylight to purplish red in incandescent light, similar to alexandrite (N= 1.765, S.G. = 3.88).

      Some say the name rhodolite comes from the Greek word, rhodon, meaning rose. Other scholars compare the name to rhododendron. In either case, the name is comparing the color to a flower.

      Enter your email to access the Ultimate Opal Buying Guide for free!

      FREE

      THANK YOU!

       

      PLEASE CHECK YOUR EMAIL FOR THE E-BOOK

      Follow us on Facebook

      亚洲人日本人jlzzy