AMETRINE

This is a natural -un heated stone from Boliva.This rough was from the miner Joe Rudd who is credited with naming the stone “Ametrine “The mine closed down years ago and this is the last of the rough to be cut. This carving show differing amounts of citrine and amethyst (as opposed to the 50/50 mix commonly seen in synthetic stones). Beautiful carving.

Grade VVS

Weight 18.74 cts app

Size 18 x 18 x 11 mm app

The citrine flows through the stone.

Sometimes amethyst and citrine colours are found in the same crystal of quartz. These bicolour yellow and purple quartz gemstones are called ametrine.

Ametrine is most typically faceted in a rectangular shape with a 50/50 pairing of amethyst and citrine. Sometimes a checkerboard pattern of facets is added to the top to increase light reflection. Ametrine can also be cut to blend the two colours so that the result is a mixture of yellow, purple, and peach tones throughout the stone.

Type 1 Gemstones
The following gemstones are typically inclusion free, even minor inclusions detract from their value.
Diamond, Amethyst, Beryls(Aquamarine,Morganite), Citrine, Smoky Quartz, topaz, Chrysoberyl, Kunzite, Tanzanite, green Tourmaline, and Blue Zircon
IF   Internally flawless under extreme magnification (Very rare)
F   Flawless
VVS   Minute inclusions under 10x; invisible to the unaided eye
VS   Minor inclusions under 10x; usually invisible to the unaided eye
SI1   Noticeable inclusions under 10x; usually visible to the unaided eye
SI2   Noticeable inclusions under 10x; usually quite visible to the unaided eye
I1   prominent- moderate affect on appearance or durability
I2   prominent - severe affect on appearance or durability
I3   prominent- severe affect on beauty, transparency or durability
Type 2 Gemstones
Gemstones that normally have small inclusions that do not detract from value.
Alexandrite, Andalusite, Iolite, Peridot, Rhodolite, Ruby, Sapphire, Spinel, Tourmaline, Garnet, Amethyst, Red Zircon, Tsavorite; Blue, Orange, Purple, Fluorite.Yellow and Parti-colored Tourmaline
F   Flawless
VVS   Minor inclusions under 10x; usually invisible to the unaided eye
VS   Noticeable inclusions under 10x; often invisible to the unaided eye
SI1   Obvious inclusions under 10x; visible to the unaided eye
SI2   Obvious inclusions under 10x; very apparent to the unaided eye
I1   prominent - moderate affect on appearance or durability
I2   prominent - severe affect on appearance or durability
I3   prominent - severe affect on beauty, transparency or durability

6 mm = 1/4 inch (Approx)