how rare is the gemstone black spinel?

I bought a black spinel 1.31ct. It is beautiful! Reading about it on the internet I found it is rare, However most stones are huge and you could not put them into a ring, the smaller stones are more expensive. Is it really more rare than a black diamond? Mine is transparent, all natural, black spinel requires no treatment other than polishing

Spinel (MgAl2O4) is a much maligned gem mineral that is often thought of as a corundum simulant because in red and blue varieties it can closely resemble ruby or sapphire. It is, however, an outstanding gem material in its own right; it is hard (8), possesses an intermediate to high R.I., shows good dispersion, and is available in a wide variety of colors. Many of the worlds most famous large “rubies” are, in fact, red spinel (e.g. Black Princes’ Ruby and Timur Ruby, both in British Crown Jewels). Such stones were once referred to as Balas Ruby, a term that is not used today but is synonymous with red spinel. The confusion is well-founded; the finest red spinels come from the same gem gravel deposits in Myanmar that are renowned for “Burma” ruby, and both share somewhat similar optical and physical properties.
Spinel, like garnet and tourmaline, is a mineral name that refers to a group of minerals all having the same crystal structure. Members within the group differ by containing varying amounts of Fe, Cr, Zn, Mn and Ni that substitute for Mg and Al in the crystal lattice. Probably the most familiar minerals that have the spinel crystal structure are the ore minerals magnetite (Fe2+Fe3+2O4) and chromite (Fe2+Cr2O4), neither of which is a gem material. Gem spinel is usually quite close in composition to Mg, Al spinel but contains small amounts of Fe, Zn, and Cr that act as chromophores and account for the wide range of possible colors. Red and pink spinel is colored by trace quantities of Cr; blue, violet, orange and green by Fe. Zn, Cr, and Co (rare) are also present in some blue, violet and purple stones

Prices for 3-5 carat or stones of top quality where in the following ranges: These are old prices and may not be current.

Blue – $100-300/ct; no gray or other overtone.
Red – $500-$1500/ct.; no brown or gray overtone; should resemble fine ruby.
Pink – $100-$600/ct
Lavender – $50-$350/ct

Freedom From Inclusions
Ideally a spinel should allow the free transmission of light throughout its body without any hindrance – quite literally, the ideal is “crystal clear”. However, as with all gems, reality tempers our expectations with a few of nature’s fingerprints.
The GIA divides all colored gems into three categories for the purposes of clarity grading, based upon their habitual tendencies to exhibit inclusions:
TYPE I Often virtually inclusion-free
TYPE II Usually slightly included
TYPE III Almost always included
Spinel is categorized as a Type II colored gem, meaning specimens are frequently slightly included and fall just short of being thought of as a habitually flawless gem type. While ruby and red spinel may share the same broad, generalist Type II category, experience teaches us that in reality red spinel is habitually cleaner.

Rene Furterer Myrrhea Anti-Frizz Silkening Shampoo 5 oz $14.99 Unruly, rebellious hairSmooth and Nourish HairTames hair and controls flyaways Gentle cleansing action Hair is under control, smooth and easy to detangle 89% of people tested confirm the smoothing actionOur Solution: 2 Active IngredientsMyrrh Extract Precious active ingredient from the Far East High concentration of resin and gum Immediate anti-frizz powerAvocado Oil High concentration of essentia…

Supre Luxx Black 50x Bronzer 12 Oz NEW for 2012 $36.00 upre Luxx Black – 50x Bronzer. Discover the powerful aura of the black pearl. Black pearls mesmerize mankind with their beauty and uniqueness. Luxx Black pampers your skin with a feeling of pure indulgence. A perfect fusion of luxury and technology, micro particles of the purest gold & diamond dust and black pearl dust lavish your body with a seduction for all of your senses. Your skin will glow …

2011 Supre LUXX BLACK 50x Bronzer Tanning Lotion 12.5 oz. $35.50 Experience the absolute pinnacle in pure excellence and ultra luxury with LuxxTM Black. This rare 50x Black Bronzing formulation combines lavish amounts of natural and sunless bronzers, rich dark tan maximizers, and Black Pearl for the absolute ultimate in high performance dark tanning gratification, while a wealth of precious resources pamper your skin with decadent hydration….

Prescription for Nutritional Healing: A Practical A-Z Reference to Drug-Free Remedies Using Vitamins, Minerals, Herbs & Food Supplements $7.90 Written by a medical doctor and a certified nutritional consultant, this comprehensive guide to nutritional, herbal, and complementary therapies discusses natural healing programs for some 300 health conditions. Arranged in alphabetical order, it’s a useful ready-reference tool….

Alternative Medicine Definitive Guide to Cancer $23.90 Based on the pioneering treatment plans of 37 alternative medicine cancer specialists, this book guides you through the safest and most effective treatment alternatives known today. Learn how leading practitioners use herbs, nutrition, supplements, diet, oxygen, enzymes, glandular extracts, homeopathic remedies, plus specialized new substances such as Ukrain, Essiac, Carnivora, Iscador, 714X, shar…