Corundum var. Red Sapphire

Zazafotsy, Ihosy, Fianarantsoa Prov., Madagascar
Small Cabinet, 6.0 x 4.3 x 2.9 cm
Start Time: 12/17/2009 6:40:00 pm (CST)
End Time: 12/29/2009 6:30:00 pm (CST)
Auction Closed

Item Description

This specimen features a 1.7 cm-long crystal perched smartly on matrix. These corundums are generally called sapphires on the market when blue and rubies when more red, though most show some zoning ...but the mineralogists tell me all are "bicolored sapphires". This crystal, however, is a more pure red than most any other I have had from this locale, and stays red whether in fluorescent or halogen lighting. It has just a slight tinge of purple or darker color to it. These normally go varying shades of red/purple and even to blue-purple depending on which lighting source you use to look at them. However, this one seems as close to pure ruby in color as any I have seen from here, though technically its still a "red sapphire" in name on chemistry. The crystal is complete and freestanding all around. it has the one minor defect of a small contact, attached matrix, on one face. The form is sharply hexagonal, with a fine terminal face showing classic corundum trigons on the very top.

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