52 Pierres de collection - woensdag 20 april 2022 - 19u00

9 beeld(en) Schatting : 3000/4000 €

Toewijzing : 5800 €
LOT N°001

Paraiba-type tourmaline of 1,79 ct. Intense blue square faceted cut. Gemstone with no indication of treatment, with a Brazilian geographical origin and following the analysis on the Laboratoire Français de Gemmologie report (LFG).
LFG Report on 21/02/2022 nr. 388872. Small piece missing from the girdle and one of the pavilion edges due to the internal structure of the stone and polishing process. Small knock on one of the corners.
Dimensions : 7,03 x 6,98 x 4,88 mm.
LFG Report on 21/02/2022 nr. 388872.
Dimensions : 7,03 x 6,98 x 4,88 mm.

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Expert notes:
The paraiba is a recent find in the history of gemology. It was discovered in the middle of the 1980s in the Paraiba state of Brazil, hence the name. From the rarest blue seen in a stone until now, the deposit exhausts itself quite rapidly. The main production today is in Mozambique. Paraiba tourmalines of Brazil remain however the most sought-after stones. The one we are presenting to you today not only derives from this desired origin, but also from an intense saturated blue that is even more rare. This gem ticks all the boxes of a precious gemstones collection.

Lees minder
7 beeld(en) Schatting : 600/1200 €

Toewijzing : 800 €
LOT N°002

Square step cut red spinel of 1,37 ct. of possible Burmese origine. The deep red color appears sometimes orangey under artificial light. Very pure. A feather can be seen under one of the edges.
Dimensions : 6,39 x 6,39 x 3,82 mm.

Expert notes :
Rarer than rubies, the red spinel is one of the most resistant stones in which the color is entirely natural. Confused for centuries with the ruby, the latter’s value on the gemstones’ market has not stopped increasing. Famous spinels include the

Lees verder ‘Côte-de-Bretagne’, once owned by Anne de Bretagne and conserved at the Louvre Museum, as well as the famous Black Prince’s Ruby, first mentioned in the middle of the 14th century, on the front of the Imperial State Crown of the United-Kingdom.

Lees minder
3 beeld(en) Schatting : 800/1200 €

Toewijzing : 1200 €
LOT N°003

Oval cut morganite of 14,59 ct. orangey pink with a beautiful transparence. Report of the Instituto Gemológico Español du 10/03/2021 nr. D-31309 (IGE).
Dimensions : 28,34 x 14,01 x 9,23 mm.
10 beeld(en) Schatting : 18000/25000 €

Toewijzing : 12000 €
LOT N°007

-- NO RESERVE PRICE --
Tanzanite of 32,81 ct. with a great transparency, elongated brillant pear shape, showing some very beautiful raspberry color flashes on a body color ranging from pronounced purple to royal blue. GIA certificate of June 8, 2021.
GIA identification report : 2396004242
Dimensions : 29.00 x 16.04 x 10.09 mm.

Expert notes:
By laying the gemstone on its table, the double color of the latter clearly shows itself. Between pinkish

Lees verder purple and violet blue, the play of colors becomes more complex as you turn and shift the stone in day and artificial light.

Lees minder
8 beeld(en) Schatting : 2500/3500 €

Toewijzing : 2000 €
LOT N°010

Welo Ethiopian natural black opal in an oval cabochon shape of 10,56 ct. combining concentric and rolling intense flashes of fire. Following the light and orientation, flaming red, royal blue, electric green, gold flashes appear in lines, circles, patches that look like fish scales .
Fire saturation: vivid. Consistance of base color : excellent.
Dimensions : 24,26 x 12,39 x 6,96 mm.
8 beeld(en) Schatting : 2000/3000 €

Toewijzing : 2000 €
LOT N°018

Deep green tsavorite garnet of 4,13 ct. High cushion mixed cut that captures light. Flashes of light also bounce on internal crystal clusters. Healing crevices through the stone. For those who love deep green tsavorites , we fluctuate here between darkness and light. Minor graining on the surface.
Dimensions : 9,43 x 8,31 x

Lees verder 6,45 mm.

Lees minder
3 beeld(en) Schatting : 800/1200 €

Toewijzing : 750 €
LOT N°019

Reversed watermelon color tourmaline slices, with the particularity of the pink inside and green outside. Nice pair. Graining.
Dimensions slice 1 : 15,18 x 12,33 x 1,88 mm.

Lees verder Helvetica, Arial, sans-serif; font-size: 14px; background-color: rgb(238, 238, 238);">Slice 2 : 15,11 x 12,43 x 2,20 mm.
Total weight: 7,99 ct.

Lees minder
8 beeld(en) Schatting : 250/350 €

Toewijzing : 400 €
LOT N°020

Concave trillion cut citrine of 16,62 ct. greenish light yellow color. The concave cut can be seen on the radiant pavilion and on the edge of the table, giving the outline a cut. Extremely bright stone thanks to this non-conventional cut that allows us to admire the art of the cutter. Some graining and a few scratches.

Lees verder 238);">Dimensions : 18,38 x 18,30 x 10,73 mm.

Lees minder
6 beeld(en) Schatting : 15000/18000 €

Toewijzing : 18000 €
LOT N°023

Padparadscha sapphire of 1,59 ct. of a very rare vivid orangy pink color. Mixed cushion cut, this sapphire has no indication of heating. Very nice transparency. Madagascar origin following the indications of the CGL report.
Carat Gem Lab Report nr. CGL25197, November 2021.
Dimensions : 6,40 x 6,22 x 4,32 mm.
Munsell Book of Color :
Primary hue : 2.5R 3/10
Secondary Hue : 5R 5/14

Lees verder background-color:="" font-size:="" helvetica="" /> Third hue : 6.25R 5/12

Expert notes:
In every auction, there is a remarkable stone. If there only had to be one, it would be this stone! A padparadscha of a color so vivid, so intense, so saturated; it is rare. In a gemologist’s lifetime, sapphires of this quality are less than the number of fingers on one hand. This padparadscha appears red, then a tender pink color adds itself to this primary red, to finally unveil an expression of bloody orange. Nature has decided. This color will be unique and well above all others. What a pleasure to be able to share this beautiful stone with Millon Belgique’s clients. It is very rare and it is really beautiful.

Lees minder
11 beeld(en) Schatting : 40000/60000 €

Toewijzing : 30000 €
LOT N°026

Superb modified cushion cut tanzanite of 49,23 ct. Thanks to its very nice cut, the stone sparkles with reddish raspberry flashes. The principal hue is intense royal blue with violet touches. Great transparency with strong pleochroism when the stone is moved laterally : intense blue on one side, violet blue on the other side.

Lees verder 238);">Identification GIA Report nr. 2406948475, 20 October 2021.
Dimensions : 24,19 x 17,62 x 13,27 mm.

Lees minder
8 beeld(en) Schatting : 4000/5000 €

Toewijzing : 3600 €
LOT N°029

Lot of three pear shape morganites, well sorted by shape, size and color which is pinkish salmon. Nice shine. It is rare to get three calibrated stones in the same hue.
Dimensions pear 1 : 15,93 x 12,15 x 7,49 mm. Poids : 7,10 ct.
Dimensions pear 2 : 16,03 x 11,93 x 6,77 mm. Poids : 6,46 ct.
Dimensions pear 3 : 16,12 x 12,15 x 7,81 mm. Poids : 7,63 ct.
8 beeld(en) Schatting : 2800/3200 €

Toewijzing : 2900 €
LOT N°030

Sensational mixed oval cut aquamarine of 11 ct., greenish blue color with a leopard pattern. ALGT laboratory defines this motive as the presence of orangey red dendritic limonite inclusions. An aventurescence phenomenon appears in specific directions. A micro-photography of the inclusions is visible on the ALGT website.

Lees verder 238);">Preliminary report ALGT nr. 88445412, 24 November 2021. Entire Report visible on the ALGT website.
Dimensions : 17,05 x 13,12 x 8,26 mm.

Lees minder
9 beeld(en) Schatting : 900/1200 €

Toewijzing : 850 €
LOT N°032

Color change oval spinel of 3,07 ct. From purple blue to pinkish purple, the color change already reveals itself when we move the stone. A light veil crosses the gemstone. Mysterious color with glittering. Few graining.
ALGT Report nr. 61201533 of 28 April 2021.

Lees verder helvetica="" style="font-family: Roboto, " /> Dimensions : 10.14 x 7.46 x 4.74 mm.

Expert notes:
Close to the table, we can identify small inclusions conveying a black color on an inclined surface. It may probably be small (non-tested) protogenetic zircons surrounded by halos. The gemologic vocabulary seems hermetic, yet the explanation is simple. A spinel has formed itself in a conducive environment while small zircons were already present for several hundreds of millions of years. Two very distant geological eras are reunited in this stone, offering the result of an atypical and sought-after spinel.

Lees minder
12 beeld(en) Schatting : 65000/85000 €

Toewijzing : 36000 €
LOT N°039

Oval brilliant faceted tanzanite of 92,19 ct. The weight but also the saturation of colors and the pleochroism are remarkable. The Royal blue color is dark but there are two other colors in this stone. Violet comes and goes with intense, almost red, raspberry flashes. A light blue appears sometimes. Beautiful transparency. No indication of heating/treatment. Two reports from well-known labs.
Lotus Gold Report nr. 9705-4705, 11 October 2021.

Lees verder background-color:="" font-size:="" helvetica="" style="font-family: Roboto, " /> GIA Report nr. 2407948371, 20 October 2021.
Dimensions : 29,58 x 24,74 x 16,91 mm.

Lees minder
9 beeld(en) Schatting : 8000/10000 €

Toewijzing : 8000 €
LOT N°046

Mixed deep cushion cut yellow sapphire of 6,49 ct. having the particularity to have little frog eggs like inclusions. Natural sapphire showing no signs of treatments and Sri Lanka (Ceylon) origin suggested by the ALGT Lab, which is confirmed by its very particular inclusions. Very soft yellow color letting the light bounce off the suspended crystals.

Lees verder rgb(238, 238, 238);">ALGT report nr. 00761245 of March 7, 2022
Dimensions : 9,44 x 9,32 x 7,90 mm.

Expert notes:
The suspension of small natural zircons is already in place during the formation of the sapphire. Once the sapphire creates itself in the earth’s crust, it undergoes strong pressures and temperatures. The material forms itself around the zircons, provoking halos that we can perfectly recognize thanks to an instrument, the polarizing filter. Two very distant geological eras are reunited in this stone.

Lees minder
8 beeld(en) Schatting : 600/800 €

Toewijzing : 650 €
LOT N°048

Bicolor Tourmaline of 6,86 ct., with a nice transparency. There is a concentration of salmon pink in the center with a few discreet lines verging on raspberry and diffusing a soft pale green color at the ends. Modified rectangular scissor-cut particulary well executed. Luminous stone with a soft luster. Discreet grainings.

Lees verder 238);">Dimensions : 12,12 x 9,04 x 6,60 mm.

Expert notes:
In this tourmaline, two major colors come together, salmon and pale green. This is why the stone is considered bicolor. To be more precise, the lines with more intense colors navigate through the stone, making it multicolor. Indeed, the pale green, the darker green, the pink, the salmon, the raspberry lines coexist with delicacy following a tender and relatively symmetric distribution.

Lees minder
2 beeld(en) Schatting : 300/400 €

Toewijzing : 300 €
LOT N°049

Lot of four round cabochons rhodochrosite of a nice purity. Quite homogeneous intense pink color and translucency in some parts. Their coral-like color and shape allow them to be classified among the "candy" gems, referring to the soft colors of childhood. Two different formats. Small graining and fissures, consequences of the nature of the stone.

Lees verder background-color: rgb(238, 238, 238);">Dimensions cabochon 1 : 12,02 x 11,95 x 5,24 mm. Weight : 7,17 ct.
Dimensions cabochon 2 : 12,06 x 11,90 x 5,23 mm. Weight : 7,09 ct.
Dimensions cabochon 3 : 12,06 x 12,02 x 5,24 mm. Weight : 7,29 ct.
Dimensions cabochon 4 : 15,90 x 15,76 x 6,66 mm. Weight : 15,95 ct.

Lees minder
10 beeld(en) Schatting : 4000/5000 €

Toewijzing : 5500 €
LOT N°050

Very shimmering natural purple red spinel of 8,09 ct. from Burma (Myanmar) as mentioned in the GLC report. Very well executed square mixed cushion cut allowing a beautiful play of light. Great transparency and uniformity of the bright color, and yet with a delicate silkiness. No mention concerning the treatment in the report.

Lees verder 238);">GLC (Thailand) report nr. A77992 of June 16, 2020.
Dimensions : 10,97 x 11,27 x 7,67 mm.
Munsell Book of Color :
Primary hue : 10RP 2/6
Secondary hue : 10RP 2/8
Tertiary nue : 10RP 5/12

Expert notes :
This spinel has no less than three colors on the same page in the Munsell Book of Color. What does this mean? We are confronted to a stone that has developed strong nuances in the same tonality. A declination on the same theme is not common.

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