Doug Menadue :: Bespoke Gems - Precision Hand Faceted Gemstones Of The Highest Quality

Blue Topaz

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Natural Blue Topaz, Eye Of Oban, Oban, New England, New South Wales, Australia, 137.25 Carats, 37x27x22mm, #746, A very fine natural Natural Blue Topaz which has been cut in the wonderful Eye Of Oban design. Doug Menadue :: Bespoke Gems :: WWW.BESPOKE-GEMS.COM - Finest Precision Custom Gemcutting Based In Sydney Australia
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Stone : Natural Blue Topaz
Cut By : Doug Menadue (2014) 2017
Item : #746
Design : Eye Of Oban
Origin : Oban, New England, New South Wales, Australia
Treatments : None
Weight : 137.25 Carats
Clarity : Very Slightly Included
Size : 37x27x22mm
Price : 6180

Comments : Being put up for sale from a private collection is this quite spectacular natural blue topaz from the Oban locale around the New England region in New South Wales. The large piece of rough topaz was found and hand dug by a long time fossicker and collector.

I cut this stone for the owner back in 2014 and it was an exceptional gem of a highly sort after type, that being natural Australian blue topaz. Oban is a fossicking location that has long been held as a spot to find very good natural blue topaz. A few older lapidary related books made reference to Oban but it was rare to find anyone who had been there for a dig and directions were always a bit vague (as is often the case with really good fossicking locations, kind of like getting a fisherman to tell you his favorite fishing spots. :-)

I cut this gem in an eye style design as it was the best fit for the piece of rough which originally weighed 300.95 carats. The gem does have a few minor veil inclusions which is quite resonable for a topaz this size. This would be a significant addition to any collection of fine Australian gems and minerals. All steps of the faceting process were documented and can be provided if the buyer is interested in this history of the stone.

Natural Blue Topaz, Eye Of Oban, Oban, New England, New South Wales, Australia, 137.25 Carats, 37x27x22mm, #746, A very fine natural Natural Blue Topaz which has been cut in the wonderful Eye Of Oban design. Doug Menadue :: Bespoke Gems :: WWW.BESPOKE-GEMS.COM - Finest Precision Custom Gemcutting Based In Sydney Australia
Natural Blue Topaz, Eye Of Oban, Oban, New England, New South Wales, Australia, 137.25 Carats, 37x27x22mm, #746, A very fine natural Natural Blue Topaz which has been cut in the wonderful Eye Of Oban design. Doug Menadue :: Bespoke Gems :: WWW.BESPOKE-GEMS.COM - Finest Precision Custom Gemcutting Based In Sydney Australia
Natural Blue Topaz, Eye Of Oban, Oban, New England, New South Wales, Australia, 137.25 Carats, 37x27x22mm, #746, A very fine natural Natural Blue Topaz which has been cut in the wonderful Eye Of Oban design. Doug Menadue :: Bespoke Gems :: WWW.BESPOKE-GEMS.COM - Finest Precision Custom Gemcutting Based In Sydney Australia
Natural Blue Topaz, Eye Of Oban, Oban, New England, New South Wales, Australia, 137.25 Carats, 37x27x22mm, #746, A very fine natural Natural Blue Topaz which has been cut in the wonderful Eye Of Oban design. Doug Menadue :: Bespoke Gems :: WWW.BESPOKE-GEMS.COM - Finest Precision Custom Gemcutting Based In Sydney Australia
Natural Blue Topaz, Eye Of Oban, Oban, New England, New South Wales, Australia, 137.25 Carats, 37x27x22mm, #746, A very fine natural Natural Blue Topaz which has been cut in the wonderful Eye Of Oban design. Doug Menadue :: Bespoke Gems :: WWW.BESPOKE-GEMS.COM - Finest Precision Custom Gemcutting Based In Sydney Australia
Natural Blue Topaz, Eye Of Oban, Oban, New England, New South Wales, Australia, 137.25 Carats, 37x27x22mm, #746, A very fine natural Natural Blue Topaz which has been cut in the wonderful Eye Of Oban design. Doug Menadue :: Bespoke Gems :: WWW.BESPOKE-GEMS.COM - Finest Precision Custom Gemcutting Based In Sydney Australia
Natural Blue Topaz, Eye Of Oban, Oban, New England, New South Wales, Australia, 137.25 Carats, 37x27x22mm, #746, A very fine natural Natural Blue Topaz which has been cut in the wonderful Eye Of Oban design. Doug Menadue :: Bespoke Gems :: WWW.BESPOKE-GEMS.COM - Finest Precision Custom Gemcutting Based In Sydney Australia

 

Swiss Blue Topaz, SG1, Brazil, SG1 Carats, 9.00x9.00x6.14mm, #1042, A very fine natural Swiss Blue Topaz which has been cut in the wonderful SG1 design. Doug Menadue :: Bespoke Gems :: WWW.BESPOKE-GEMS.COM - Finest Precision Custom Gemcutting Based In Sydney Australia
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Stone : Swiss Blue Topaz
Cut By : Doug Menadue 2017
Item : #1042
Design : SG1
Origin : Brazil
Treatments : Enhanced
Weight : 3.16 Carats
Clarity : Very Very Slightly Included
Size : 9.00x9.00x6.14mm
Price : 285

Comments : This is a fine swiss blue topaz that has been cut in the high performance round brilliant design, SG1. The colour is excellent and like a really good aquamarine. This swiss blue topaz would make a perfect ring or pendant stone as the size is just right. The gem is very bright and flashy and the design gives it alot of life.

Swiss Blue Topaz, SG1, Brazil, SG1 Carats, 9.00x9.00x6.14mm, #1042, A very fine natural Swiss Blue Topaz which has been cut in the wonderful SG1 design. Doug Menadue :: Bespoke Gems :: WWW.BESPOKE-GEMS.COM - Finest Precision Custom Gemcutting Based In Sydney Australia
Swiss Blue Topaz, SG1, Brazil, SG1 Carats, 9.00x9.00x6.14mm, #1042, A very fine natural Swiss Blue Topaz which has been cut in the wonderful SG1 design. Doug Menadue :: Bespoke Gems :: WWW.BESPOKE-GEMS.COM - Finest Precision Custom Gemcutting Based In Sydney Australia
Swiss Blue Topaz, SG1, Brazil, SG1 Carats, 9.00x9.00x6.14mm, #1042, A very fine natural Swiss Blue Topaz which has been cut in the wonderful SG1 design. Doug Menadue :: Bespoke Gems :: WWW.BESPOKE-GEMS.COM - Finest Precision Custom Gemcutting Based In Sydney Australia

 

Natural Blue Topaz, Pharoah, Brazil, #469
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Stone : Natural Blue Topaz
Cut By : Doug Menadue, 2012
Item : #469
Design : Pharoah
Origin : Brazil
Treatments : None
Weight : 18.7 carats
Clarity : Very Very Slightly Included
Size : 14.8 x 14.8 x 11.5 mm
Price : 2960

Comments : A magnificent natural blue topaz gemstone! This is a very fine gemstone that is cut in a design which is an exceptionally challenging one to cut. I very much like this design and when I look at it I keep thinking "Art Deco" for some reason. The gem is a good solid stone with a good feel to it. There are a number of very fine silver needle inclusions that are common to topaz but the are very fine and minor and do not detract from the overall appearance of the gem at all - you really need a loupe to see them. Other then that the gem is eye clean. The internal facet patterns and reflections are fascinating and in all lighting situations, this gem is a stunner!

Natural Blue Topaz, Pharoah, Brazil, #469
Natural Blue Topaz, Pharoah, Brazil, #469
Natural Blue Topaz, Pharoah, Brazil, #469
Natural Blue Topaz, Pharoah, Brazil, #469
Natural Blue Topaz, Pharoah, Brazil, #469
Natural Blue Topaz, Pharoah, Brazil, #469
Natural Blue Topaz, Pharoah, Brazil, #469
Natural Blue Topaz, Pharoah, Brazil, #469
Natural Blue Topaz, Pharoah, Brazil, #469
Natural Blue Topaz, Pharoah, Brazil, #469
Natural Blue Topaz, Pharoah, Brazil, #469

 

Natural Blue Topaz, Concave Iris Cut, O'Briens Creek, North Queensland, Australia, #c4e
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Stone : Natural Blue Topaz
Hand Dug By : Doug Menadue
Item : #c4e
Design : Concave Iris
Origin : O'Briens Creek, North Queensland, Australia
Treatments : None
Weight : 1.5 carats each (two remaining)
Clarity : Very Slightly Included / Eye Clean
Size : 7 x 7x 5 mm
Price : 70

Comments : A nice little parcel of fine topaz from O'Briens Creek. The colour is soft and could be called silver with a touch of blue. They are very nice gems, quite bright and lively. The concave cut design, I think, creates an iris-like effect.

Natural Blue Topaz, Concave Iris Cut, O'Briens Creek, North Queensland, Australia, #c4e
Natural Blue Topaz, Concave Iris Cut, O'Briens Creek, North Queensland, Australia, #c4e
Natural Blue Topaz, Concave Iris Cut, O'Briens Creek, North Queensland, Australia, #c4e
Natural Blue Topaz, Concave Iris Cut, O'Briens Creek, North Queensland, Australia, #c4e
Natural Blue Topaz, Concave Iris Cut, O'Briens Creek, North Queensland, Australia, #c4e

 

Natural Blue Topaz, Concave Iris Cut, O'Briens Creek, North Queensland, Australia, #c4c
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Stone : Natural Blue Topaz
Hand Dug By : Doug Menadue
Item : #c4c
Design : Concave Iris
Origin : O'Briens Creek, North Queensland, Australia
Treatments : None
Weight : 1.5 carats each, Matched Parcel
Clarity : Very Slightly Included/Eye Clean
Size : 7 x 7 mm
Price : 70 each

Comments : Here is a fine matched parcel of O'Briens Creek natural blue topaz. These gems have been concave cut in a design that reminds me of an iris. The colour of these gems is quite soft and you could say they were silvery with a touch of blue about them. Available as a parcel or individually.

Natural Blue Topaz, Concave Iris Cut, O'Briens Creek, North Queensland, Australia, #c4c
Natural Blue Topaz, Concave Iris Cut, O'Briens Creek, North Queensland, Australia, #c4c
Natural Blue Topaz, Concave Iris Cut, O'Briens Creek, North Queensland, Australia, #c4c
Natural Blue Topaz, Concave Iris Cut, O'Briens Creek, North Queensland, Australia, #c4c
Natural Blue Topaz, Concave Iris Cut, O'Briens Creek, North Queensland, Australia, #c4c
Natural Blue Topaz, Concave Iris Cut, O'Briens Creek, North Queensland, Australia, #c4c

 

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Information For precious and semi precious gemstones

Stone : Topaz / Blue Topaz
Moh's Hardness : 8
Origin Locations : O'Briens' Creek, Mt Surprise, North Queensland, Australia; Oban, NSW, Australia; Africa; Minas Gerais, Brazil; Texas, USA; Russia; Afghanistan; Madagascar; Cornwall, England; and others.
Treatments : None to Various
Weight : Ranges from < 5 grams to 1KG+. Commonly found < 20 grams
Clarity : Eye Clean to Included
Color : Clear silvery white, natural blue, treated blues (eg. london blue, electric blue, swiss blue, sky blue), yellow, red-brown, red, pink-red, violet, green
Cleavage : Perfect
Chemical Composition : Al2[(F,OH)2/SiO4] - fluor containing aluminum silicate
Refractive Index (RI) : 1.609 - 1.643
Density : 2.49 - 3.57

Birthstones : Topaz (Yellow/Golden) is the birthstone for November.
Blue topaz (natural or treated) is the birthstone for December.
Topaz is the zodiac stone for the sign of Sagittarius.
Topaz is the ayurvedic birthstone for November.
Blue topaz is the stone for the 4th anniversary
Topaz is the stone for the 23rd anniversary

Comments : The history of topaz is a long and ancient one and the gem has long been used as an ornament and jewelry stone. The name "Topaz" is thought to come from the name of an island in the Red Sea formerly called Topazos but now Zebirget. Topaz was mined here on this island. Another possible origin of the name Topaz is that it comes from the Sanskrit word "tapas" which means "fire" or "heat". This could be due to the yellow/red colour that topaz sometimes occurs in.

Many people believe that topaz comes only in yellow and this is true, it does come in yellow. However fancy colors like yellow, reds, oranges and pinks are actually quite rare, so is the very beautiful natural blue. My personal thoughts on why yellow has become closely associate with topaz, in the same way that blue is associated with sapphire, is that in historical times the technology or ability to differentiate between types of stones was very limited. Yellow quartz, now known as Citrine, is quite common in many parts of the world and I believe that alot of yellow topaz was actually yellow quartz. Today we have the ability to tell the difference between the various types of stones but one still has to be cautious in the marketplace and buy from a reputable dealer as there is still the potential for confusion.

Topaz makes an ideal jewelry stone as it is hard and very durable. It cuts well into brilliant designs and becomes a gem that has lots of scintillation and "fire". If I was pushed to pick a personal favorite of all the gemstones, I would probably have to give
natural blue topaz the nod. It is a stone that I love to cut and the colour, though soft, is divine. Truly it is! The soft blue colour is for me, the most elegant of blues, soft and delicate, sometimes ethereal, sometimes icy like the blue in an arctic iceberg. It is cooling on a hot day, fresh and light and always cheery and pleasing. Each stone is unique in its coloring, some have more blue, some less. The colour is easily as beautiful as aquamarine and in truth, far better then the vast majority of aquamarine that is in the marketplace.

Sadly, with the advent of modern gemstone treatment technology, natural blue topaz has taken an undeserved fall from popularity. Irradiation and heating is now routinely used to change the clear silvery white topaz into a uniform array of vivid treated blues. These stones have the trade names of london blue, electric blue, swiss blue and sky blue. The colour is the same for each category and this is the material that you see in jewelry stores across the land. It is cheap and plentiful whereas the natural blues are scarce and relatively expensive. This sudden mass explosion of treated blues dealt the natural blues a blow and that is sad, for these natural blues are easily one of the most beautiful gems in the world of coloured gemstones. Blue sapphires might be the Queen of Gems, but if there is a Princess of Gems, she would be a natural blue topaz.

 

 

 

 

 

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