Cats eye chrysoberyl

  • Hi ridhaanya,
    I have studied the photograph of the chrysoberyl catseye you have uploaded and am impressed by the color, clarity and chatoyancy (catseye effect) of the stone, just as much as you were startled by its clarity and chatoyancy (sharp line). I need a proper description of the color of the stone, before I can give you an approximate valuation for it. From the photograph you have uploaded the color of the stone appears yellowish-green. Common colors in which chrysoberyl catseyes can exist are light-yellow, light-green, yellowish-green and honey-color. Honey-color is considered top-grade by many gemologists, and a honey-colored catseye chrysoberyl is referred to as "milk and honey" in the trade, a term commonly used by Sri Lankan gem dealers. The term refers to a milky-ray of white-light (catseye) crossing the cabochon-cut stone, as a center line along its length and overlying the honey-colored background. Accordingly honey-colored catseye chrysoberyls fetch the highest prices, followed by other colors depending on the intensity of the color, clarity/translucency, and sharpness of the "eye," and the weight of the stone.


    I am uploading images of some chrysoberyl catseyes having the following colors :-
    1) Milk and Honey Color
    2) Lemon-yellow color
    3) Yellowish-green color


    Details of the five Chrysoberyl cat's-eyes given below are as follows :-


    1) Christie's Hong Kong Magnificent Jewels, November 27, 2012. Lot 1621 - Honey-colored Chrysoberyl cat's-eye; unknown weight; estimate - US$5,185 - $7,778; price realized - US$27,555.
    2) Christie's Jewels : The Hong Kong Sale, May 26, 2009 - Lot 1522 - Honey-colored Chrysoberyl cat's-eye, 19.22 carats; estimate - US$36,292 - $49,253; price realized - US$48,606.
    3) Christie's Hong Kong Magnificent Jewels, May 29, 2012. Lot 3579 - Honey-colored Chrysoberyl cat's-eye; unknown weight; estimate US$7,800 - $10,000; price realized - US$27,504.
    4) Bonham's New York Fine Jewelry Auction, December 13, 2011. Lot 206 - Lemon-yellow Chrysoberyl cat's-eye; 25.25 carats; estimate not known; price realized US$31,250.
    5) Chrysoberyl cat's-eye from http://www.multicolor.com website selliing colored gemstones online. Yellowish-green Chrysoberyl cat's-eye weighing 15.55 carats; Selling price US$17,312

  • Thank you so much for the reply i have been trying to take pics in the sunlight somehow the whole pic would have a glare to it.i have some other pics which i will post.the color is greenish yellow and the weight 9 carats.

  • Details of some Chrysoberyl cat's-eyes that appeared at the Tiancheng International Jewelry and Jadeite Spring and Autumn Auctions 2014, and Sotheby's Hong Kong Fine Jewels and Jadeite sale November 2014 are given below. These Chrysoberyl cat's-eyes have varying colors such as yellowish-green,, greenish-yellow and honey-colored/golden-yellow/golden brown color. The images of these Chrysoberyl cat's-eyes are also given.


    Tiancheng International Jewellery and Jadeite Spring Auction 2014 held on June 8, 2014
    1) Lot 231 - VERY IMPORTANT CAT’S-EYE CHRYSOBERYL ‘DOUBLE DRAGON’ RING - Centerpiece of the 18k yellow-gold ring carved with dragon motifs, is a 77.01-carat, round cabochon-cut, cat's-eye chrysoberyl of Sri Lanka origin, with a blend of colors producing the "milk and honey" effect. Accompanied by a GGL report certifying that the cat's-eye is of Sri Lanka origin, with no indications of heating. Estimate US$695,000 - 820,000. Lot sold for US$821,000.


    Tiancheng International Jewellery and Jadeite Autumn Auction 2014 held on 7 December 2014
    1) Lot 51 - CAT'S-EYE CHRYSOBERYL AND DIAMOND RING, CATHERINE SAUVAGE - Centerpiece of the 18k yellow-gold ring is a 11.24-carat, round cabochon-cut, greenish-yellow cat's-eye chrysoberyl of Sri Lanka origin. Accompanied by GRS report certifying the Sri Lanka origin of the cat's-eye with no indications of treatment. Estimate US$10,000-15,000. Lot sold at US$14,450.


    2) Lot 80 - CAT'S-EYE CHRYSOBERYL AND DIAMOND RING, "THE GOLDEN GLOBE" - Centerpiece of the 18k white-gold ring is a 50.40-carat, round cabochon-cut, yellowish-green catseye chrysoberyl of Sri Lanka origin with exceptional transparency, and straight, very pronounced chatoyancy . Accompanied by three lab reports by GGL, GRS and Dunaigre certifying that the catseye is of Sri Lanka origin with no indications of heating. Estimate US$385,000 to 520,000. Lot sold at - US$456,000.


    Sotheby's Hong Kong Fine Jewels and Jadeite sale November 27, 2014
    1) Lot 1432 - CAT'S-EYE CHRYSOBERYL AND DIAMOND RING - Centerpiece of the 18k white-gold ring is a 9.17-carat, honey-colored cat's-eye chrysoberyl of Sri lanka origin, highlighted by a pear-shaped diamond surround. GRS reports certify the natural Sri Lanka origin of the stone with no indications of heating. Estimate USD 12,900-19,300. Lot sold for US$24,000


    2) Sotheby's Hong Kong Jewels and Jadeite sale April 2011 - Lot 1749 - CAT'S-EYE CHRYSOBERYL AND DIAMOND RING. Centerpiece of the ring is a 20.14-carat, oval cabochon-cut, yellowish-green, cat's-eye chrysoberyl with an exceptional degree of transparency and well-centered, straight, and very-pronounced chatoyancy. Accompanied by GGL report certifying the natural origin of the stone. Country of origin not given. Estimate USD 87,000-100,000. Lot sold for USD 120,000. Cat's-Eye chrysoberyl photographed unmounted.






  • We have considered 10 Chrysoberyl cat's-eyes in our discussion, and most of them had appeared at public auctions conducted by leading auction houses. The estimated values of these Chrysoberyl cat's-eyes give a proper valuation for these gemstones, as such evaluation was done by expert gem valuers before the auction. The actual price realized at the auction may not reflect the true value of the gmstone, as hammer prices at public auctions can be artificially inflated due to competitive bidding among rival prospective bidders or such other factors like the historic provenance of the gemstone.
    Let us now list the 10 gemstones giving their estimated values and the price-per-carat of each.


    1) Honey-colored Chrysoberyl cat's-eye of unknown weight - Estimate US$5,185 - $7,778; price-per-carat cannot be calculated without the weight of the stone.

    2) 19.22-carat, honey-colored Chrysoberyl Cat's-eye - Estimate US$36,292 - $49,253. price-per-carat US$1,888 - $2,562.
    3) Honey-colored Chrysoberyl cat's-eye of unknown weight - Estimate US$7,800 - $10,000. price-per-carat cannot be calculated.
    4) 25.25 carat, Lemon-yellow Chrysoberyl cat's-eye - Estimate not known. Price realized US$31,250. Price-per-carat US$1,237
    5) 15.55 carat, Yellowish-green Chrysoberyl cat's-eye - Estimate/selling price - US$17,312. Price-per-carat - US$1,113
    6) 77.01-carat, honey-colored Chrysoberyl Cat's-eye - Estimate US$695,000 - 820,000. Price-per-carat US$9,025 - $10,648.
    7) 11.24-carat, greenish-yellow Chrysoberyl Cat's-eye - Estimate US$10,000-15,000. Price-per-carat US$889 - $1,334.
    8) 50.40-carat, yellowish-green Chrysoberyl Cat's-eye - Estimate US$385,000 to 520,000. Price-per-carat US$7,638 - $10,317.
    9) 9.17-carat, honey-colored Chrysoberyl Cat's-eye - Estimate USD 12,900-19,300. Price-per-carat US$1,406 - $2,104
    10) 20.14-carat, yellowish-green, Chrysoberyl Cat's-eye - Estimate USD 87,000-100,000. Price-per-carat US$4,319 - $4,965



    Arranging the Chrysoberyl Cat's-eyes in descending order of their estimated values


    1) 77.01-carat, honey-colored Chrysoberyl Cat's-eye - Estimate US$695,000 - 820,000.
    2) 50.40-carat, yellowish-green Chrysoberyl Cat's-eye - Estimate US$385,000 to 520,000.
    3) 20.14-carat, yellowish-green, Chrysoberyl Cat's-eye - Estimate USD 87,000-100,000.
    4) 19.22-carat, honey-colored Chrysoberyl Cat's-eye - Estimate US$36,292 - $49,253
    5) 25.25 carat, Lemon-yellow Chrysoberyl cat's-eye - Price realized US31,250
    6) 9.17-carat, honey-colored Chrysoberyl Cat's-eye - Estimate USD 12,900-19,300.
    7) 15.55 carat, Yellowish-green Chrysoberyl cat's-eye - Estimate/selling price - US$17,312.
    8)11.24-carat, greenish-yellow Chrysoberyl Cat's-eye - Estimate US$10,000-15,000.
    9) Honey-colored Chrysoberyl cat's-eye of unknown weight - Estimate US$7,800 - $10,000.
    10) Honey-colored Chrysoberyl cat's-eye of unknown weight - Estimate US$5,185 - $7,778


    Arranging the Chrysoberyl Cat's-eyes in descending order of their price-per-carat values


    1)77.01-carat, honey-colored Chrysoberyl Cat's-eye, Price-per-carat US$9,025 - $10,648.
    2) 50.40-carat, yellowish-green Chrysoberyl Cat's-eye, Price-per-carat US$7,638 - $10,317.
    3) 20.14-carat, yellowish-green, Chrysoberyl Cat's-eye, . Price-per-carat US$4,319 - $4,965
    4) 19.22-carat, honey-colored Chrysoberyl Cat's-eye, Price-per-carat US$1,888 - $2,562.
    5) 9.17-carat, honey-colored Chrysoberyl Cat's-eye, Price-per-carat US$1,406 - $2,104
    6) 11.24-carat, greenish-yellow Chrysoberyl Cat's-eye, Price-per-carat US$889 - $1,334.
    7) 25.25 carat, Lemon-yellow Chrysoberyl cat's-eye, Price-per-carat US$1,237
    8) 15.55 carat, Yellowish-green Chrysoberyl cat's-eye, . Price-per-carat - US$1,113
    9) Honey-colored Chrysoberyl cat's-eye of unknown weight, Price-per-carat cannot be calculated
    10) Honey-colored Chrysoberyl cat's-eye of unknown weight, Price-per-carat cannot be calculated

  • Analysis of the list of ten Chrysoberyl cat's-eyes arranged in descending order of estimated values and price-per-carat values, show that the color of the gemstones have little bearing on the prices. A honey-colored Chrysoberyl cat's-eye tops the list both for estimated values and ppc values, followed by a Yellowish-green Chrysoberyl cat's-eye occupying the second place.The third place is occupied by yellowish-green gemstone and the 4th-place by a honey-colored gemstone again. Hence, there appears to be no direct relationship between the color of the gemstone and the prices achieved. Even though honey-color is considered to be top-grade, yellowish-green/lemon-yellow gemstones have also performed quite well occupying the 2nd, 3rd, 5th/6th, 7th and 8th places. Honey-colored stones occupy the 1st, 4th and 5th/6th places.


    A careful study of both lists show that the single most important factor that has a bearing on the prices achieved is the weight of the gemstone. The first two gemstones on the list having the highest weights 77.01 carats and 50.40 carats have the highest estimated values and price-per-carat values in the range of USD350,00-850,000 and USD7,000-11,000 respectively. When the weight drops to 20.14 carats the estimated value also drops drastically from the range of US$350,000-550,000 to US$80,000-100,000 and the ppc values from the range of US$7,000-10,000 to US$4,000-5,000, eventhough the color of the 50.40-carat and 20.14-carat gemstones are almost identical (yellowish-green). When the weight drops below 20 carats to 19.22 carats there is further drop in the estimated value from the range of US$80,000-100,000 to US$30,000-50,000 and the ppc values from the range of USD4,000-5, 000 to USD1,500-2,500. When the weight drops to around 10 carats (9.17 and 11.24) the estimated value drops further to around USD10,000-20,000 and the ppc values to around USD1,000-2,000. The 15.55-carat yellowish-green chrysoberyl cat's-eye available for online purchase from the website multicolor.com has been priced at USD17,312. This works out to a ppc-value of USD1,113 which falls within the range of USD1,000-2,000 for 10-carat chrysoberyls.


    Ridhaanya, I think we can now consider the valuation of your 9.00-carat chrysoberyl cat's-eye of excellent clarity and translucency. The three chrysoberyl cat's-eyes weighing 9.17-carats, 11.24 carats and 15.55 carats would give us an approximate guidance to the value of your gemstone. Accordingly I feel the ppc-value of your gemstone should fall within the range of USD1,000-2,000 and the whole stone price of your Chrysoberyl Cat'seye falls within the range of USD9,000-18,000.