A great emerald hanging from a dragon skin chain

Description:	Ahhh, thats all you can say as you gaze into this emerald. Its beauty is unmatched! This most be the largest emerald in the world. The most amazing thing about the emerald is that now and then it turns black as the night, losing its sparkle. However, as soon as you blink, it emits a green light blast and sparkles once more!
Armour type:	Missing type
Stats:	+6 con
It looks	0.095kg (Weight in kgs unknown)
Sacvalue:	286k
It is called	It is called great emerald necklace and identified as 'necklace', 'dragon skin chain', 'skin chain', 'chain' and 'great emerald'.
It takes the following slot:	neck
Made of:	emerald
Size:	Missing size
Quality:	shoddy
From:	Hera, Castle Brantis