Very clean spinel.   Inside mostly no inclusions to be seen or maybe none.   Extremely brilliant reflection.   Makes me look at other stones and all of a sudden size doesn't matter nearly as much as color and cut.   I love this stone!   I've never posted any of these because I've been hoarding all the best ones.  I never really wanted to sell them.  I have quite a few I had collected.  Started buying more lately and the prices have skyrocketed.   Normal price for this stone is over $30,000!
This is from Luc Yen Vietnam.   This deposit is in the same marble deposit that occurs in Myanmar Burma.   Luc Yen is only around 750 kms from the Man Sin deposit where the Jedi spinel came from.  I see a some calling dim burgundy red spinel Jedi which couldn't be further from the truth.  This is gorgeous looking spinel but it's not jedi it's just vivid red.   Jedi has a pinkish red glow.  This one is more like fine ruby.  
Luc Yen stones do not get treated.   No heat on the Luc Yen spinel.   Spinel do not respond to treatments like sapphire.  So rest assured this stone is 100% natural and untreated.   
Mined from under the rice fields in the alluvial gravels in the shallow valley near the original marble deposit.  Rubies and sapphire are also associated with this deposit similar to the Burma deposit.  I'm was a geologist before I became a gem enthusiast/gemologist.   My business plan is to bring the better quality gemstones to my customers at a better more fair price.