MAKE AN OFFER

8.40ct Sillimanite

KURM73

Currently Unavailable!

Gemstone
Sillimanite
Carat Weight
8.4000Cts (avg)
Size
10.50mm x 14.00mm
Shape
Oval
Cut
Brilliant
Treatment
Not enhanced

MY OFFER

Instructions here on how to submit your offer. We will respond as to whether you have been successful within 72 hours.

£
SUBMIT MY OFFER

GEMSTONE ATTRIBUTES

Origin
India
Family
Hardness
7.5
Specific Gravity
Refractive Index
1.669 - 1.684

MORE INFORMATION

Crystal Group
Orthrombic
Optical Properties
Vitreous to subadamantine lustre
Care
Cleaning Advice
Chemical Composition
Al2SiO5

DESCRIPTION

For a long time this gemstone has only been considered as a collectors stone. Named after Professor Silliman of Yale University. Sillimanite is a rare fusion of Kyanite and Andulusite. It seamlessly blends the pure natural hues of incredibly rare Olive Kyanite and the strong pleochrism found in Andulusite.

When in its noncrystalline form it is known as fibrolite. The name derives from the long slender crystal prisms which resemble fibers. In this form it can have a silky luster and in some cases shows the cats eye effect of chatoyancy.

DELIVERY INFORMATION

We work closely with our selected couriers to ensure that delivery is made quickly and securely to your door.
We only charge a single P&P for unlimited items and you can build up your order by adding more items throughout the day.
Items requiring personalization or resizing will take longer whilst they are worked on.
Items requiring personalization or resizing will take longer. Details can find found when placing an order and in confirmation.

Delivery Services

Premium Delivery in 2 to 3 working days - £4.95
Standard Delivery in 4 to 6 working days - £2.95

Other Destinations
Standard
Premium
Country Standard Cost Premium Cost
 United Kingdom 4-6 days £2.95 2-3 days £4.95
 United States 5-8 days £3.81
 Australia 5-8 days £5.32
 Austria 3-5 days £7.19
 Belgium 3-5 days £7.19
 Cyprus 3-6 days £7.19
 Denmark 3-5 days £7.19
 Finland 6-7 days £7.19
 France 3-5 days £7.19
 Germany 3-5 days £7.19
 Greece 5-8 days £7.19
 Israel 5-8 days £5.38
 Italy 3-6 days £7.19
 Luxembourg 3-5 days £7.19
 Malta 4-6 days £7.19
 Netherlands 3-5 days £7.19
 New Zealand 5-8 days £8.65
 Poland 4-6 days £7.00
 Portugal 4-5 days £7.19
 Puerto Rico 5-7 days £3.81
 Republic of Ireland 3-5 days £7.19
 South Africa 5-8 days £6.66
 Spain 4-6 days £7.19
 Sweden 6-7 days £7.19
 United Arab Emirates 3-8 days £9.22
 Virgin Islands (u.s.) 5-7 days £3.81