Here is a beautiful oval color-change sapphire you may want - It is 6.81 X 5.41 X 3.16 mm; in a deep, but no too dark, blue violet Ceylon color.
This stone is certified unheated by the Tokyo Gem Laboratory, weighs 1.13 carats.
Note that most corundum (rubies, sapphires) treatments are done with heat; but this sapphire is also untreated in any way.
The last photo is taken under incandescent light, and shows the slight violet color change from the other photos taken in sunlight.
 VS clarity - small inclusions are evident, as is common with natural unheated sapphires.  
 International shipping cost varies by location, and a handling charge is added to cover the cost of international insurance.
International buyers may be responsible for paying an import duty, depending on your country.

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My CAD service can put this stone in a custom piece of jewelry of your design or mine, that will exceed all your expectations. - message me to discuss the options.