C.H. jewelry is crafted in K gold and platinum
Suitable for everyday wear
including bathing and contact with water.
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K gold is more durable than pure gold and, unlike electroplated materials, does not fade over time.
It is ideal for everyday jewelry and gemstone settings, maintaining its shape and beauty for long-lasting wear.
The color of K gold can be adjusted by blending different metals.Options such as white gold and rose gold allow for a variety of personal styles and preferences.
Pure gold is commonly referred to as 24K (99.9% gold content)
Due to its softness, it is less suitable for everyday jewelry.
【 C.H. jewelry is crafted
exclusively in 18K and 14K gold for optimal durability and wearability.】
18K gold is the most common ratio in the K gold series, containing 75% pure gold.
It is typically marked with the “750” stamp.
Compared to other K gold alloys, 18K gold holds higher value and is widely used in mid- to high-end jewelry making.
With its high gold content, 18K gold offers stable value and strong asset worth.
It is especially suitable for natural diamond settings and is widely used in luxury jewelry design.
18K gold offers excellent durability and oxidation resistance. With proper care, it can be worn for a lifetime.
Its longevity also makes it highly valuable as a collectible piece.
14K gold offers beautiful luster, durability, and excellent value for money.
It is typically marked with the “585” stamp on jewelry pieces.
Compared to 18K gold, the visual difference is nearly indistinguishable to the naked eye.
14K gold is highly durable and resistant to scratches and deformation,
making it especially suitable for jewelry worn on a daily basis.
14K gold requires minimal maintenance and does not discolor, maintaining its original luster over time.
It may be worn during showering (excluding jewelry with pearls), allowing you to enjoy its beauty with ease.
Platinum is extremely rare, with an annual production of only one-tenth that of gold.
With a melting point as high as 1,768°C, it is difficult to craft, yet exceptionally stable and resistant to oxidation.
Even with long-term wear, platinum maintains its luster and refined texture.
Its rarity, durability, and complexity in craftsmanship give platinum strong commemorative and collectible value.
It is a material that has only become workable with modern technology over the past century.
Platinum is the only precious metal that is naturally pure white.
It achieves a bright white luster without the need for electroplating.
With its high density, hardness, and toughness, platinum is exceptionally durable and ideal for long-term wear.
It is especially suited for diamond and precious gemstone settings, symbolizing eternity and enduring commitment.
Platinum is highly resistant to corrosion and discoloration, and can even withstand hot spring environments.
It is a popular choice for wedding rings in Japan.
Platinum wedding rings are suitable for long-term wear, without concern for fading or excessive wear—
truly offering peace of mind for a lifetime of wear.