Entire F-4000 Set

Gem Filter Set F-4000

0.50 LBS
  • Product Description

    Characterization and identification of gems by the use of color filters has always been an appealing approach because of its affordable simplicity and the ease of examining multiple specimens.  Using these filters is simple.  Just place the stone on the included viewing surface, illuminate it with incandescent light, and hold the filter close to the eye.  Observe the apparent color of the stone and match that up with the identifying chart that comes with the filter.

    This set includes the following individual filters:

    • Aquafilter - for differentiating blue gemstones, separating Aquamarine from Topaz and other blue gems.  Using the Aquafilter, here is the appearance of pale blue gemstones:  


    Apparent Color

    Aquamarine Green
    Topaz Blue-Gray
    Spinel Pinkish
    Sapphire Grey
    Tanzanite Pinkish
    Zircon and Benitoite

    Brilliant flashes of Red and Blue-Green


    • Ruby Filter - A green filter for discriminating among red stones such as Ruby, Spinel, Tourmaline, and Garnets.  Using the Ruby Filter, here is the appearance of various red and pink gemstones: 


    Apparent Color

    Ruby Bright Blue
    Red Glass Dark Purple
    Spinel Gray/Blue
    Pink Spinel Light Blue
    Pink Sapphire Light Blue
    Tourmaline Gray/Purple
    Almandine Garnet Gray
    Rhodolite Garnet Gray
    Pyrope Garnet Brownish
    Red Beryl Gray
    • Synthetic Emerald Characterization Set - allows one to quickly separate synthetic Emeralds (flux or hydrothermal) from natural Emeralds.  Used in conjunction with the Chelsea Colour Filter, this filter set greatly simplifies the recognition of synthetic emeralds.  Just remember, "Red, Red, Drop Dead!".  Select this link for more details on the Synthetic Emerald set.

    • Bead Buyer's and Parcel Picker's Filter Set - a 4 filter set designed for the simultaneous examination of a number of gemstones, either as a string of beads or a parcel of loose stones.  The idea is that if all the beads or stones in a set are of identical material, they will appear the same when viewed through any filter in this set.

    Full instructions are included.  This item typically ships within 1  business day.

  • Product Reviews


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    1. Terrific service,

      Love the filters, but have to add that the customer service - helping me correct my own error was great. Very appreciated. Definitely recommends,

      on Dec 16th 2020

    2. efficient!

      I love having all of these light filtering cards available at my fingertips. They are compact, yet a good size for doing what they were designed for!
      As well, Mineral Labs provided me with absolutely outstanding customer service! I actually got my order shipped the same day it was placed; and within 20 minutes, at that! Lol, they may have set the bar too high - but I doubt it!
      on Jun 22nd 2016

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